Calcupedia

Unit Conversion Calculators (288)

This collection covers real unit math from the ground up, starting with a cm to in converter, a ft to m and m to ft converter, and a full currency converter suite for international travel, freelancers, forex trading, ecommerce, wire transfers, expats, and crypto to fiat. Weight and temperature get the same treatment: kg to lbs, lbs to kg, celsius to fahrenheit, and fahrenheit to celsius, alongside cm to feet, meters, millimeters, and kilometers, inches to cm, and every other length pairing you would actually search for. Sizing gets real depth too: bra size, belt size, shoe size, and ring size, all with real conversion charts across US, UK, and EU systems.

Distance and volume get just as much coverage: km to miles and kilometers to miles, feet to miles, ml to oz and oz to ml, mph to kmh, and every other speed, area, pressure, and volume pairing in between. There is also a full time family covering days to weeks, minutes to hours, and every duration pairing you need, a byte and data storage converter, big number naming for millions, billions, and lakhs and crores, and US coin to dollar conversions for pennies, nickels, dimes, and quarters.

For anyone who wants to type in one unit and see every equivalent at once, this collection includes live multi field converter hub pages for kilometers, gallons, pressure units, area, volume, time, data storage, speed, torque, and angle, plus a density aware set for converting between volume and mass across water, flour, sugar, honey, butter, oil, salt, and more, and a real base converter for binary, decimal, octal, and hex.

unit conversion

Acreage Converter

Convert acreage — the size of a plot of land — into square feet, square meters, square yards, hectares, and square kilometers. Type any value and every field updates instantly, ideal for farming and real estate.

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Acres to Hectares Converter

Convert acres to hectares using the exact 0.404685642224 hectares per acre factor.

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Acres to Square Feet Converter

Convert acres to square feet using the exact 43,560 square feet per acre factor.

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Acres to Square Miles Converter

Convert acres to square miles using the exact 640 acres per square mile factor.

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Angle Converter

Convert angles between degrees, radians, gradians, arcminutes, and arcseconds. Type any value into any field and every other unit updates instantly.

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Angstroms to Nanometers Converter

Convert angstroms to nanometers using the exact 10 angstroms per nanometer factor.

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Area Converter

Convert between square meters, square feet, acres, and hectares.

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Ares to Cents Converter

Convert ares to cents, a South Indian land measurement unit equal to 1/100 of an acre.

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Ares to Hectares Converter

Convert ares to hectares using the exact 100 ares per hectare factor.

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Astronomical Units to Kilometers Converter

Convert astronomical units (AU) to kilometers using the exact IAU-defined 149,597,870.7 km per AU factor.

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Atmosphere Converter

Convert atmospheres to pascals, kilopascals, megapascals, bar, psi, and mmHg. Type any value into any field and every other unit updates instantly.

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Atmospheres to Pascals Converter

Convert standard atmospheres to pascals using the exact 101,325 pascals per atmosphere factor.

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Bar to Atmospheres Converter

Convert bar to standard atmospheres using the exact 101,325 pascals per atmosphere reference.

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Bar to PSI Converter

Convert bar to pounds per square inch (psi) using the exact 14.503773773 psi per bar factor.

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Bar to PSIG Converter

Convert a bar gauge-pressure reading to psig (pounds per square inch, gauge) using the exact 14.503773773 psi per bar factor.

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Barometric Pressure Converter

Convert barometric (weather) pressure readings between mmHg, atmospheres, kilopascals, pascals, megapascals, bar, and psi. Type any value and every field updates instantly.

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Belt Size Calculator

Converts waist circumference into a numerical belt size, general size letter, and recommended belt strap length.

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Billion to Trillion Converter

Convert billions to trillions using the exact 1,000 billion per trillion factor (short scale).

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Binary / Decimal / Octal / Hex Converter

Convert between binary, decimal, octal, and hexadecimal number systems. Type a value into any field and every other base updates instantly.

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Binary to Hexadecimal Converter

Convert a binary number to its hexadecimal representation.

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Binary to Octal Converter

Convert a binary number to its octal representation.

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Bra Size Calculator

Converts underbust and bust circumference measurements into a bra band size and cup letter.

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Byte Converter

Convert bytes to kilobytes, megabytes, gigabytes, and terabytes, using the traditional binary (1,024) convention for digital storage. Type any value into any field and every other unit updates instantly.

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CCF to Gallons Converter

Convert CCF (hundred cubic feet, a common US utility billing unit) to gallons.

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CCF to Therms Converter

Convert CCF (hundred cubic feet) of natural gas to therms, using the standard national average heating value.

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Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit using the standard formula F = C times 9/5 plus 32.

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Centigrade to Celsius Converter

Convert centigrade to Celsius. The two scales are numerically identical.

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Centimeter Converter

Convert centimeters to millimeters, meters, kilometers, inches, feet, yards, and miles. Type any value into any field and every other unit updates instantly.

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Centimeters to Feet and Inches Converter

Convert a centimeter height or length measurement into feet and inches.

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Centimeters to Inches Converter

Convert centimeters to inches using the exact 2.54 centimeters per inch factor.

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Centimeters to Kilometers Converter

Convert centimeters to kilometers using the exact 100000 centimeters per kilometer factor.

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Centimeters to Meters Converter

Convert centimeters to meters using the exact 100 centimeters per meter factor.

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Centimeters to Millimeters Converter

Convert centimeters to millimeters using the exact 10 millimeters per centimeter factor.

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Cents to Dollars Converter

Convert US cents to dollars using the exact 100 cents per dollar factor.

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Cents to Square Meters Converter

Convert cents, a South Indian land unit, to square meters using the exact 40.468564224 square meters per cent factor.

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Clothing Size Converter (International)

Convert a clothing size between US, UK, EU, and international sizing systems.

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cm to mm & Ring Size Converter

Converts the inner circumference of a ring or diameter from centimeters to millimeters, and looks up the equivalent ring size across six international sizing systems at the same time.

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cm to Ring Size Converter

Converts the inner circumference of a ring or diameter measured in centimeters into the equivalent ring size across six international sizing systems.

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Crore to Lakh Converter

Convert crores to lakhs, both traditional South Asian numbering units, using the exact 100 lakh per crore factor.

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Crore to Million Converter

Convert crores to millions using the exact 10 million per crore factor.

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Crypto to Fiat Currency Converter

Convert between Bitcoin, Ethereum, and other major cryptocurrencies and 51 world fiat currencies using real-time market rates.

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Cubic Centimeters to Fluid Ounces Converter

Convert cubic centimeters to US fluid ounces using the exact 29.5735295625 cc per fluid ounce factor.

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Cubic Centimeters to Grams Converter (by Ingredient)

Convert cubic centimeters to grams for a chosen ingredient, using its real density.

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Cubic Centimeters to Liters Converter

Convert cubic centimeters to liters using the exact 1,000 cubic centimeters per liter factor.

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Cubic Centimeters to Milliliters Converter

Convert cubic centimeters to milliliters. One cubic centimeter equals exactly one milliliter by definition.

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Cubic Feet Converter

Convert cubic feet to liters, cubic meters, gallons, milliliters, and cubic inches. Type any value into any field and every other unit updates instantly.

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Cubic Feet to Cubic Meters Converter

Convert cubic feet to cubic meters using the exact 0.028316846592 cubic meters per cubic foot factor.

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Cubic Feet to Gallons Converter

Convert cubic feet to US gallons using the exact 7.480519480519481 gallons per cubic foot factor.

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Cubic Feet to Pounds Converter (by Ingredient)

Convert cubic feet to pounds for a chosen ingredient, using its real density.

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Cubic Inches to Gallons Converter

Convert cubic inches to US gallons using the exact 231 cubic inches per gallon factor.

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Cubic Meter Converter

Convert cubic meters to liters, cubic feet, gallons, milliliters, and cubic inches. Type any value into any field and every other unit updates instantly.

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Cubic Meters to Tons Converter (by Ingredient)

Convert cubic meters to US short tons for a chosen ingredient, using its real density.

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Cubic Yards to Tons Converter (by Ingredient)

Convert cubic yards to US short tons for a chosen ingredient, using its real density.

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Cups to Fluid Ounces Converter

Convert US cups to fluid ounces using the exact 8 fluid ounces per cup factor.

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Cups to Gallons Converter

Convert US cups to gallons using the exact 16 cups per gallon factor.

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Cups to Pints Converter

Convert US cups to pints using the exact 2 cups per pint factor.

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Cups to Quarts Converter

Convert US cups to quarts using the exact 4 cups per quart factor.

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Currency Converter (Live Rates)

Convert between 51 world currencies using real-time exchange rates, refreshed at least once every 24 hours.

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Currency Converter for E-Commerce and International Sales

Convert product prices and international sales totals between currencies using real-time exchange rates, for online sellers pricing across borders.

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Currency Converter for Expats and Immigrants

Convert income, rent, or savings between a home currency and a new country currency using real-time exchange rates.

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Currency Converter for Forex Trading

Convert between major currency pairs using real-time market rates, for forex traders sizing positions and checking quotes.

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Currency Converter for Freelancers and Remote Workers

Convert client payments and invoices between currencies using real-time exchange rates, for freelancers and remote workers paid internationally.

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Currency Converter for Import and Export Businesses

Convert invoice totals, purchase orders, or shipment values between currencies using real-time exchange rates, for import and export businesses.

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Currency Converter for International Travel

Convert a travel budget into the currency of your destination using real-time exchange rates.

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Currency Converter for International Wire Transfers

Convert the amount being sent or received through an international wire transfer using real-time exchange rates.

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Data Storage Converter

Convert between bytes, kilobytes, megabytes, gigabytes, and terabytes.

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Data Transfer Rate Converter

Convert data transfer speeds between bits and bytes per second, and estimate download time.

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Day Converter

Convert days to hours, minutes, seconds, milliseconds, and weeks. Type any value into any field and every other unit updates instantly.

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Days to Months Converter

Convert days to months using the average 30.4375-day month, based on the standard Julian year.

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Days to Weeks Converter

Convert days to weeks using the exact 7 days per week factor.

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Days to Years Converter

Convert days to years using the standard 365.25-day Julian year.

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dBm to Watts Converter

Convert dBm, a logarithmic power unit common in RF and telecom, to watts.

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Decagrams to Grams Converter

Convert decagrams to grams using the exact 10 grams per decagram factor.

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Decimal Degrees to DMS Converter

Convert decimal degrees into degrees, minutes, and seconds (DMS) format, commonly used for latitude and longitude.

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Decimal Inches to Fraction Converter

Convert a decimal inch measurement into the nearest standard fraction, rounded to the nearest sixteenth of an inch.

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Decimal to Hexadecimal Converter

Convert a decimal number to its hexadecimal representation.

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Decimal to Octal Converter

Convert a decimal number to its octal representation.

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Decimeters to Meters Converter

Convert decimeters to meters using the exact 10 decimeters per meter factor.

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Degrees to Arcminutes Converter

Convert degrees to arcminutes using the exact 60 arcminutes per degree factor.

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Degrees to Arcseconds Converter

Convert degrees to arcseconds using the exact 3,600 arcseconds per degree factor.

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Degrees to Radians Converter

Convert degrees to radians using the exact pi/180 factor.

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Dimes to Dollars Converter

Convert a count of US dimes to dollars using the exact 10 dimes per dollar factor.

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Distance Converter

A general-purpose distance converter for trips, road distances, and everyday measurements. Convert between kilometers, miles, meters, feet, and every other length unit at once — type any value and every field updates instantly.

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Dress Size Calculator

Determines a dress size across US, UK, EU, and international systems from bust, waist, and hip measurements.

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Drops to Milliliters Converter

Convert drops to milliliters using the standard medicinal-drop convention of 20 drops per milliliter.

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Energy Converter

Convert between joules, kilojoules, kilowatt-hours, kilocalories, and BTU.

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Fahrenheit to Celsius Converter

Convert Fahrenheit to Celsius using the standard formula C = (F minus 32) times 5/9.

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Feet Converter

Convert feet to inches, yards, miles, meters, centimeters, millimeters, and kilometers. Type any value into any field and every other unit updates instantly.

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Feet to Centimeters Converter

Convert feet to centimeters using the exact 30.48 centimeters per foot factor.

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Feet to Inches Converter

Convert feet to inches using the exact 12 inches per foot factor.

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Feet to Meters Converter

Convert feet to meters using the exact 0.3048 meters per foot factor.

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Feet to Miles Converter

Convert feet to miles using the exact 5,280 feet per mile factor.

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Feet to Yards Converter

Convert feet to yards using the exact 3 feet per yard factor.

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Fluid Ounces to Cubic Centimeters Converter

Convert US fluid ounces to cubic centimeters using the exact 29.5735295625 cc per fluid ounce factor.

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Fluid Ounces to Cups Converter

Convert US fluid ounces to cups using the exact 8 fluid ounces per cup factor.

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Fluid Ounces to Milliliters Converter

Convert US fluid ounces to milliliters using the exact 29.5735295625 mL per fluid ounce factor.

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Fluid Ounces to Pounds Converter (by Ingredient)

Convert US fluid ounces to pounds for a chosen ingredient, using its real density.

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Gaj to Square Yards Converter

Convert gaj, a South Asian real estate land unit, to square yards. One gaj equals exactly one square yard.

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Gallon Converter

Convert gallons to liters, cubic feet, cubic meters, milliliters, and cubic inches. Type any value into any field and every other unit updates instantly.

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Gallons to Cubic Feet Converter

Convert US gallons to cubic feet using the exact 231/1728 cubic feet per gallon factor.

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Gallons to Cups Converter

Convert US gallons to cups using the exact 16 cups per gallon factor.

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Gallons to Grams Converter (by Ingredient)

Convert US gallons to grams for a chosen ingredient, using its real density.

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Gallons to Kilograms Converter (by Ingredient)

Convert US gallons to kilograms for a chosen ingredient, using its real density.

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Gallons to Pints Converter

Convert US gallons to pints using the exact 8 pints per gallon factor.

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Gallons to Pounds Converter (by Ingredient)

Convert US gallons to pounds for a chosen ingredient, using its real density.

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Gallons to Quarts Converter

Convert US gallons to quarts using the exact 4 quarts per gallon factor.

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Gallons to Tons Converter (by Ingredient)

Convert US gallons to US short tons for a chosen ingredient, using its real density.

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Glove Size Calculator

Converts hand circumference into a glove size for men or women, in both numeric and letter form.

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Gold Weight Converter (Troy Oz / Grams)

Convert gold and precious metal weights between troy ounces, grams, and other common units.

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Grains to Milliliters Converter (by Ingredient)

Convert grains, a small mass unit, to milliliters for a chosen ingredient.

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Grains to Teaspoons Converter (by Ingredient)

Convert grains, a small mass unit, to teaspoons for a chosen ingredient.

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Grams to Fluid Ounces Converter (by Ingredient)

Find how many US fluid ounces a given weight in grams takes up, for a chosen ingredient.

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Grams to Liters Converter (by Ingredient)

Find how many liters a given weight in grams takes up, for a chosen ingredient.

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Grams to Milliliters Converter (by Ingredient)

Find how many milliliters a given weight in grams takes up, for a chosen ingredient.

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Grams to Ounces Converter

Convert grams to ounces using the exact 28.349523125 grams per ounce factor.

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Grams to Pounds Converter

Convert grams to pounds using the exact 453.59237 grams per pound factor.

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Hat Size Calculator

Converts head circumference into hat sizes across international, US, and UK sizing systems.

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Hectares to Acres Converter

Convert hectares to acres using the exact 0.404685642224 hectares per acre factor.

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Height Converter

Convert a person's height between centimeters, meters, inches, and feet. Type any value into any field and every other unit updates instantly — ideal for medical forms, sports stats, and everyday conversions.

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Hour Converter

Convert hours to days, minutes, seconds, milliseconds, and weeks. Type any value into any field and every other unit updates instantly.

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Hours to Days Converter

Convert hours to days using the exact 24 hours per day factor.

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Hours to Minutes Converter

Convert hours to minutes using the exact 60 minutes per hour factor.

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Hours to Seconds Converter

Convert hours to seconds using the exact 3,600 seconds per hour factor.

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Hours to Weeks Converter

Convert hours to weeks using the exact 168 hours per week factor.

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Hours to Years Converter

Convert hours to years using the standard 365.25-day Julian year.

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Inch Converter

Convert inches to feet, yards, miles, meters, centimeters, millimeters, and kilometers. Type any value into any field and every other unit updates instantly.

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Inch-Pounds to Foot-Pounds Converter

Convert inch-pounds to foot-pounds using the exact 12 inch-pounds per foot-pound factor.

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Inch-Pounds to Newton-Meters Converter

Convert inch-pounds to newton-meters using the exact 0.1129848290276167 N-m per in-lb factor.

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Inches to Centimeters Converter

Convert inches to centimeters using the exact 2.54 centimeters per inch factor.

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Inches to Meters Converter

Convert inches to meters using the exact 0.0254 meters per inch factor.

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Inches to Ring Size Converter

Converts the inner circumference of a ring or diameter measured in inches into the equivalent ring size across six international sizing systems.

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Inches to Yards Converter

Convert inches to yards using the exact 36 inches per yard factor.

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Jacket Size Calculator

Determines a jacket or coat size in both US and EU systems from body measurements.

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Jeans Size Calculator

Determines a jeans size across US, UK, and EU systems from waist circumference and inseam length.

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Kelvin to Celsius Converter

Convert Kelvin to Celsius using the exact 273.15 offset factor.

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Kelvin to Fahrenheit Converter

Convert Kelvin to Fahrenheit using the standard combined formula.

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kgf/cm² to PSI Converter

Convert kilogram-force per square centimeter (kgf/cm²) to pounds per square inch (psi).

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Kilobytes to Megabytes Converter

Convert kilobytes to megabytes using the traditional 1,024 kilobytes per megabyte convention.

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Kilograms to Gallons Converter (by Ingredient)

Find how many US gallons a given weight in kilograms takes up, for a chosen ingredient.

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Kilograms to Liters Converter (by Ingredient)

Find how many liters a given weight in kilograms takes up, for a chosen ingredient.

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Kilograms to Milliliters Converter (by Ingredient)

Find how many milliliters a given weight in kilograms takes up, for a chosen ingredient.

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Kilograms to Ounces Converter

Convert kilograms to ounces using the exact 28.349523125 grams per ounce factor.

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Kilograms to Pounds Converter

Convert kilograms to pounds using the exact 0.45359237 kilograms per pound factor.

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Kilograms to Stone Converter

Convert kilograms to stone using the exact 6.35029318 kilograms per stone factor.

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Kilometer Converter

Convert kilometers to millimeters, centimeters, meters, inches, feet, yards, and miles. Type any value into any field and every other unit updates instantly.

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Kilometers to Feet Converter

Convert kilometers to feet using the exact 0.3048 meters per foot factor.

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Kilometers to Meters Converter

Convert kilometers to meters using the exact 1,000 meters per kilometer factor.

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Kilometers to Miles Converter

Convert kilometers to miles using the exact 1.609344 kilometers per mile factor.

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Kilopascal Converter

Convert kilopascals to pascals, megapascals, atmospheres, bar, psi, and mmHg. Type any value into any field and every other unit updates instantly.

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Kilopascals to Atmospheres Converter

Convert kilopascals to standard atmospheres using the exact 101,325 pascals per atmosphere reference.

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Kilopascals to mmHg Converter

Convert kilopascals to millimeters of mercury (mmHg) using the exact 133.322387415 pascals per mmHg factor.

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Kilopascals to PSI Converter

Convert kilopascals to pounds per square inch (psi) using the exact 6,894.757293168361 pascals per psi factor.

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Knots to Kilometers per Hour Converter

Convert knots to kilometers per hour using the exact 1.852 km/h per knot factor.

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Knots to Miles per Hour Converter

Convert knots to miles per hour using the exact 1.150779448 mph per knot factor.

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KSI to Megapascals Converter

Convert ksi (thousand pounds per square inch) to megapascals, commonly used in materials engineering.

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KSI to PSI Converter

Convert ksi (thousand pounds per square inch) to psi using the exact 1,000 psi per ksi factor.

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Land Area Converter

Convert land area between square meters, square feet, square yards, acres, hectares, and square kilometers. Type any value into any field and every other unit updates instantly.

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Length Converter

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.

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Light-Years to Kilometers and Miles Converter

Convert light-years to kilometers and miles using the standard IAU-defined distance a light-year represents.

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Liters to Centiliters Converter

Convert liters to centiliters using the exact 100 centiliters per liter factor.

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Liters to Cubic Centimeters Converter

Convert liters to cubic centimeters using the exact 1,000 cubic centimeters per liter factor.

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Liters to Pounds Converter (by Ingredient)

Convert liters to pounds for a chosen ingredient, using its real density.

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Mbps Converter

Convert Mbps (megabits per second) to Kbps, Gbps, and bits per second, using the standard decimal (1,000) convention for network speed. Type any value into any field and every other unit updates instantly.

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Mbps to Gbps Converter

Convert megabits per second (Mbps) to gigabits per second (Gbps) using the standard 1,000 Mbps per Gbps network convention.

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Megabytes to Gigabytes Converter

Convert megabytes to gigabytes using the traditional 1,024 megabytes per gigabyte convention.

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Megapascal Converter

Convert megapascals to pascals, kilopascals, atmospheres, bar, psi, and mmHg. Type any value into any field and every other unit updates instantly.

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Megapascals to PSI Converter

Convert megapascals to pounds per square inch (psi) using the exact 6,894.757293168361 pascals per psi factor.

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Megapascals to PSIG Converter

Convert a megapascal gauge-pressure reading to psig (pounds per square inch, gauge).

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Meter Converter

Convert meters to centimeters, millimeters, kilometers, inches, feet, yards, and miles. Type any value into any field and every other unit updates instantly.

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Meters per Second to Kilometers per Hour Converter

Convert meters per second to kilometers per hour using the exact 3.6 factor.

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Meters to Feet Converter

Convert meters to feet using the exact 0.3048 meters per foot factor.

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Meters to Feet Converter (Precise)

Convert meters to feet using the exact 0.3048 meters per foot factor.

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Meters to Miles Converter

Convert meters to miles using the exact 1,609.344 meters per mile factor.

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Micrograms to Milligrams Converter

Convert micrograms to milligrams using the exact 1,000 micrograms per milligram factor.

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Micrograms to Milliliters Converter (by Ingredient)

Convert micrograms to milliliters for a chosen ingredient, using its real density.

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unit conversion

Microns to Mils Converter

Convert microns (micrometers) to mils using the exact 25.4 microns per mil factor.

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Mile Converter

Convert miles to kilometers, meters, centimeters, millimeters, inches, feet, and yards. Type any value into any field and every other unit updates instantly.

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Military Time (24-Hour) Converter

Convert a standard 12-hour AM/PM time into 24-hour military time format.

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Milligrams to Cubic Centimeters Converter (by Ingredient)

Convert milligrams to cubic centimeters for a chosen ingredient, using its real density.

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Milligrams to Milliliters Converter (by Ingredient)

Convert milligrams to milliliters for a chosen ingredient, using its real density.

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Milligrams to Pounds Converter

Convert milligrams to pounds using the exact 453,592.37 milligrams per pound factor.

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Milligrams to Tablespoons Converter (by Ingredient)

Convert milligrams to tablespoons for a chosen ingredient, using its real density.

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Milligrams to Teaspoons Converter (by Ingredient)

Convert milligrams to teaspoons for a chosen ingredient, using its real density.

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unit conversion

Milliliters to Cubic Centimeters Converter

Convert milliliters to cubic centimeters. One milliliter equals exactly one cubic centimeter by definition.

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unit conversion

Milliliters to Cups Converter

Convert milliliters to US cups using the exact 236.5882365 mL per cup factor.

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Milliliters to Fluid Ounces Converter

Convert milliliters to US fluid ounces using the exact 29.5735295625 mL per fluid ounce factor.

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Milliliters to Kilograms Converter (by Ingredient)

Convert milliliters to kilograms for a chosen ingredient, using its real density.

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Milliliters to Microliters Converter

Convert milliliters to microliters using the exact 1,000 microliters per milliliter factor.

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Milliliters to Pounds Converter (by Ingredient)

Convert milliliters to pounds for a chosen ingredient, using its real density.

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Milliliters to Tablespoons Converter

Convert milliliters to US tablespoons using the exact 14.78676478125 mL per tablespoon factor.

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Milliliters to Teaspoons Converter

Convert milliliters to US teaspoons using the exact 4.92892159375 mL per teaspoon factor.

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Millimeter Converter

Convert millimeters to centimeters, meters, kilometers, inches, feet, yards, and miles. Type any value into any field and every other unit updates instantly.

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Millimeters to Feet Converter

Convert millimeters to feet using the exact 304.8 millimeters per foot factor.

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Millimeters to Inches Converter

Convert millimeters to inches instantly with the exact 25.4 millimeters per inch factor.

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Millimeters to Kilometers Converter

Convert millimeters to kilometers using the exact 1,000,000 millimeters per kilometer factor.

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Millimeters to Meters Converter

Convert millimeters to meters using the exact 1000 millimeters per meter factor.

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Million to Billion Converter

Convert millions to billions using the exact 1,000 million per billion factor (short scale).

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Million to Lakh Converter

Convert millions to lakhs, a traditional South Asian numbering unit, using the exact 10 lakh per million factor.

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Million to Thousand Converter

Convert millions to thousands using the exact 1,000 thousand per million factor.

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Milliseconds Converter

Convert milliseconds to seconds, minutes, hours, days, and weeks. Type any value into any field and every other unit updates instantly.

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Milliseconds to Seconds Converter

Convert milliseconds to seconds using the exact 1,000 milliseconds per second factor.

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Mils to Inches Converter

Convert mils (thousandths of an inch) to inches using the exact 1,000 mils per inch factor.

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Mils to Millimeters Converter

Convert mils (thousandths of an inch) to millimeters using the exact 0.0254 millimeters per mil factor.

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Minute Converter

Convert minutes to hours, days, seconds, milliseconds, and weeks. Type any value into any field and every other unit updates instantly.

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Minutes to Days Converter

Convert minutes to days using the exact 1,440 minutes per day factor.

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Minutes to Decimal Hours Converter

Convert a minutes value to decimal hours, useful for payroll and timesheet calculations.

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Minutes to Hours Converter

Convert minutes to hours using the exact 60 minutes per hour factor.

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Minutes to Seconds Converter

Convert minutes to seconds using the exact 60 seconds per minute factor.

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Minutes to Years Converter

Convert minutes to years using the standard 365.25-day Julian year.

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mm to Ring Size Converter

Converts the inner circumference of a ring or diameter measured in millimeters into the equivalent ring size across six international sizing systems.

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mmHg to Atmospheres Converter

Convert millimeters of mercury (mmHg) to standard atmospheres using the exact 133.322387415 pascals per mmHg factor.

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Months to Years Converter

Convert months to years using the exact 12 months per year factor.

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Nanometers to Meters Converter

Convert nanometers to meters using the exact 1,000,000,000 nanometers per meter factor.

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Newton-Meter Converter

Convert newton-meters to foot-pounds and inch-pounds. Type any value into any field and every other unit updates instantly.

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Newton-Meters to Foot-Pounds Converter

Convert newton-meters to foot-pounds using the exact 1.3558179483314003 N-m per ft-lb factor.

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Newton-Meters to Inch-Pounds Converter

Convert newton-meters to inch-pounds using the exact 0.1129848290276167 N-m per in-lb factor.

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Nickels to Dollars Converter

Convert a count of US nickels to dollars using the exact 20 nickels per dollar factor.

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Number Base Converter (Bin/Oct/Hex/Dec)

Convert a number between binary, octal, decimal, and hexadecimal bases.

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Number to Billion Converter

Convert a raw number into its equivalent expressed in billions.

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Number to Million Converter

Convert a raw number into its equivalent expressed in millions.

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Ounces to Grams Converter

Convert ounces to grams using the exact 28.349523125 grams per ounce factor.

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Ounces to Kilograms Converter

Convert ounces to kilograms using the exact 28.349523125 grams per ounce factor.

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Ounces to Pounds Converter

Convert ounces to pounds using the exact 16 ounces per pound factor.

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Pascal Converter

Convert pascals to kilopascals, megapascals, atmospheres, bar, psi, and mmHg. Type any value into any field and every other unit updates instantly.

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Pascals to PSI Converter

Convert pascals to pounds per square inch (psi) using the exact 6,894.757293168361 pascals per psi factor.

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Pennies to Dollars Converter

Convert a count of US pennies to dollars using the exact 100 pennies per dollar factor.

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Pints to Cups Converter

Convert US pints to cups using the exact 2 cups per pint factor.

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Pints to Gallons Converter

Convert US pints to gallons using the exact 8 pints per gallon factor.

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Pints to Pounds Converter (by Ingredient)

Convert US pints to pounds for a chosen ingredient, using its real density.

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Pixels to Em Converter

Convert pixels to em units for CSS, based on a chosen base font size.

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Pixels to Inches Converter

Convert pixels to inches using a chosen screen or print resolution in dots per inch (DPI).

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Pound-Force to Newtons Converter

Convert pound-force to newtons using the exact 4.4482216152605 newtons per pound-force factor.

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Pounds to Grams Converter

Convert pounds to grams using the exact 453.59237 grams per pound factor.

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Pounds to Grams Converter (Precise)

Convert pounds to grams using the exact 453.59237 grams per pound factor.

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Pounds to Kilograms Converter

Convert pounds to kilograms using the exact 0.45359237 kilograms per pound factor.

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Pounds to Ounces Converter

Convert pounds to ounces using the exact 16 ounces per pound factor.

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Pounds to Stone Converter

Convert pounds to stone using the exact 14 pounds per stone factor.

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Power Converter

Convert between watts, kilowatts, and horsepower.

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PPM to mg/L Converter

Convert parts per million (ppm) to milligrams per liter (mg/L) for dilute aqueous solutions.

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Pressure Converter

Convert between pascals, kilopascals, bar, psi, and atmospheres.

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Pressure Unit Converter

A general-purpose pressure converter covering every common unit at once — pascals, kilopascals, megapascals, atmospheres, bar, psi, and mmHg. Type any value and every field updates instantly.

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PSI Converter

Convert PSI to pascals, kilopascals, megapascals, atmospheres, bar, and mmHg. Type any value into any field and every other unit updates instantly.

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PSI to Atmospheres Converter

Convert pounds per square inch (psi) to standard atmospheres using the exact 101,325 pascals per atmosphere reference.

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PSI to Inches of Water Converter

Convert pounds per square inch (psi) to inches of water column (inH2O), a low-pressure unit common in HVAC and gas measurement.

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PSIG to PSIA Converter

Convert gauge pressure (psig) to absolute pressure (psia) by adding standard atmospheric pressure.

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Quarters to Dollars Converter

Convert a count of US quarters to dollars using the exact 4 quarters per dollar factor.

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Quarts to Cups Converter

Convert US quarts to cups using the exact 4 cups per quart factor.

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Quarts to Gallons Converter

Convert US quarts to gallons using the exact 4 quarts per gallon factor.

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Quarts to Pounds Converter (by Ingredient)

Convert US quarts to pounds for a chosen ingredient, using its real density.

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Radians to Degrees Converter

Convert radians to degrees using the exact 180/pi factor.

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Ring Size Calculator

General ring size converter: enter a finger inner circumference or diameter in millimeters or inches, and get the equivalent size across six international sizing systems.

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Roman Numeral Converter

Convert any whole number (1-3999) into Roman numerals.

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Seconds Converter

Convert seconds to minutes, hours, days, milliseconds, and weeks. Type any value into any field and every other unit updates instantly.

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Seconds to Days Converter

Convert seconds to days using the exact 86,400 seconds per day factor.

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Seconds to Hours Converter

Convert seconds to hours using the exact 3,600 seconds per hour factor.

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Seconds to Minutes Converter

Convert seconds to minutes using the exact 60 seconds per minute factor.

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Seconds to Years Converter

Convert seconds to years using the standard 365.25-day Julian year.

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Sheets to Reams and Quires Converter

Convert a sheet count to reams and quires, standard paper-quantity units.

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Shoe Size Converter (US/EU/UK)

Convert a shoe size between US, EU, and UK sizing systems.

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unit conversion

Sock Size Calculator

Converts a US shoe size for men into a matching sock size.

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unit conversion

Speed Converter

Convert between miles per hour, kilometers per hour, meters per second, and knots.

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unit conversion

Square Centimeters to Square Millimeters Converter

Convert square centimeters to square millimeters using the exact 100 square millimeters per square centimeter factor.

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Square Feet Converter

Convert square feet to square meters, square yards, acres, hectares, and square kilometers. Type any value into any field and every other unit updates instantly.

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unit conversion

Square Feet to Acres Converter

Convert square feet to acres using the exact 43,560 square feet per acre factor.

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Square Inches to Square Feet Converter

Convert square inches to square feet using the exact 144 square inches per square foot factor.

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unit conversion

Square Meter Converter

Convert square meters to square feet, square yards, acres, hectares, and square kilometers. Type any value into any field and every other unit updates instantly.

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unit conversion

Square Meters to Square Feet Converter

Convert square meters to square feet using the exact 0.09290304 square meters per square foot factor.

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Square Miles to Square Kilometers Converter

Convert square miles to square kilometers using the exact 2.589988110336 square kilometers per square mile factor.

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unit conversion

Square Yard Converter

Convert square yards to square feet, square meters, acres, hectares, and square kilometers. Type any value into any field and every other unit updates instantly.

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unit conversion

Square Yards to Acres Converter

Convert square yards to acres using the exact 4,840 square yards per acre factor.

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Stone to Kilograms Converter

Convert stone to kilograms using the exact 6.35029318 kilograms per stone factor.

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unit conversion

Stone to Pounds Converter

Convert stone to pounds using the exact 14 pounds per stone factor.

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Sunglasses Size & Face Shape Calculator

Classifies your face shape from facial measurements and recommends a sunglasses frame width to match.

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unit conversion

Tablespoons to Grams Converter (by Ingredient)

Convert tablespoons to grams for a chosen ingredient, using its real density.

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unit conversion

Tablespoons to Milliliters Converter

Convert US tablespoons to milliliters using the exact 14.78676478125 mL per tablespoon factor.

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unit conversion

Teaspoons to Grams Converter (by Ingredient)

Convert teaspoons to grams for a chosen ingredient, using its real density.

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unit conversion

Teaspoons to Milliliters Converter

Convert US teaspoons to milliliters using the exact 4.92892159375 mL per teaspoon factor.

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unit conversion

Tie Length Calculator

Recommends a necktie length category based on your height, collar size, and knot type.

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unit conversion

Torque to Horsepower Calculator

Calculate horsepower from torque and engine RPM using the standard automotive formula.

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unit conversion

Torr to Atmospheres Converter

Convert torr to standard atmospheres using the exact 760 torr per atmosphere definition.

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unit conversion

Volume Converter

Convert between liters, milliliters, gallons, quarts, and cups.

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unit conversion

Weeks to Months Converter

Convert weeks to months using the average 4.348 weeks per month, based on the standard Julian year.

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unit conversion

Weeks to Years Converter

Convert weeks to years using the standard 365.25-day Julian year.

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unit conversion

Weight Converter

Convert between kilograms, grams, pounds, ounces, and stones.

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unit conversion

Yard Converter

Convert yards to feet, inches, miles, meters, centimeters, millimeters, and kilometers. Type any value into any field and every other unit updates instantly.

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unit conversion

Yards to Meters Converter

Convert yards to meters using the exact 0.9144 meters per yard factor.

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Yards to Miles Converter

Convert yards to miles using the exact 1,760 yards per mile factor.

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Years to Decades Converter

Convert years to decades using the exact 10 years per decade factor.

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