Calcupedia

Chemistry & Biology Calculators (93)

Real lab and life science math gets covered from the ground up, starting with molecular weight, molarity, and dilution calculators for any concentration or solution, alongside pH, ideal gas law, molar mass, stoichiometry, half life decay, osmolarity, and the Henderson-Hasselbalch buffer equation. Genetics gets its own real depth too: Punnett square, dihybrid and trihybrid cross, allele frequency, Hardy-Weinberg, mutation frequency, and ligation, plus DNA concentration, qPCR efficiency, protein concentration and molecular weight, PCR annealing temperature, log reduction, cell doubling time, and bacterial growth rate.

The agriculture and forestry side runs just as deep: crop and grain math for corn yield, grain bin sizing, grain conversion, grass and vegetable seed, dry matter, feed conversion ratio, growing degree units, plant population, potting soil, pine straw, sod, and livestock fencing, plus tree diameter, height, leaves, spacing, and value, and controlled environment tools for vapor pressure deficit, CO2 grow rooms, daily light integral, and bulb spacing.

There is also a full set of pet health and veterinary calculators: dog and cat BMI, weight, cage, crate, and harness sizing across dogs, cats, birds, guinea pigs, hamsters, rats, horses, and rabbits, a full ten species gestation calculator family, quality of life scoring, heat cycle and water intake, and real weight based dosing for Benadryl, cephalexin, tramadol, Metacam, fish oil, and omega 3, plus onion, raisin, and chocolate toxicity checks, all with prominent veterinary disclaimers.

chemistry biology

Allele Frequency Calculator

Calculate dominant and recessive allele frequencies in a population from genotype counts.

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chemistry biology

Animal Mortality Rate Calculator

Calculate the mortality rate for a group of livestock or animals from the number of deaths and the initial population.

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chemistry biology

Bacterial Growth Rate Calculator

Calculate bacterial growth rate and doubling time from population change over time.

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chemistry biology

Basal Area Calculator

Calculate a tree cross-sectional basal area at breast height from its diameter.

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chemistry biology

Benadryl Dosage Calculator for Cats

Calculate a weight-based Benadryl (diphenhydramine) dose estimate for cats. Not a substitute for veterinary advice -- always consult your veterinarian before giving any medication.

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chemistry biology

Benadryl Dosage Calculator for Dogs

Calculate a weight-based Benadryl (diphenhydramine) dose estimate for dogs. Not a substitute for veterinary advice -- always consult your veterinarian before giving any medication.

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chemistry biology

Bird Age Calculator

Convert a pet bird age into equivalent human years based on species average lifespan.

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chemistry biology

Boiling Point Elevation Estimator

Estimate the boiling point increase of a solvent caused by a dissolved solute.

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chemistry biology

Bulb Spacing Calculator

Calculate how many flower bulbs fit in a garden bed at a given rectangular grid spacing.

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chemistry biology

Cat BMI Calculator

Calculate a feline body mass index (FBMI) from rib cage circumference and leg length.

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chemistry biology

Cat Chocolate Toxicity Calculator

Estimate chocolate toxicity risk for a cat based on body weight, chocolate type, and amount eaten. Not a substitute for veterinary advice -- contact your vet immediately if your cat has eaten chocolate.

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chemistry biology

Cat Pregnancy Calculator

Estimate a cat due date range from the number of days since mating.

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chemistry biology

Cat Quality of Life Calculator

Score a cat quality of life across 7 wellbeing factors using the published HHHHHMM scale.

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chemistry biology

Cattle per Acre Calculator

Estimate how many cattle a pasture can support based on forage yield, utilization rate, and animal unit size.

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chemistry biology

Cell Doubling Time Calculator

Calculate cell doubling time and growth rate from initial and final cell concentration measurements.

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chemistry biology

Cephalexin Dosage Calculator for Cats

Calculate a weight-based cephalexin antibiotic dose estimate for cats. Not a substitute for veterinary advice -- never administer without a veterinary prescription.

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chemistry biology

Cephalexin Dosage Calculator for Dogs

Calculate a weight-based cephalexin antibiotic dose estimate for dogs. Not a substitute for veterinary advice -- never administer without a veterinary prescription.

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chemistry biology

CO2 Grow Room Calculator

Calculate how much CO2 is needed to raise a grow room from a current to a target CO2 concentration.

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chemistry biology

Corn Yield Calculator

Estimate corn yield in bushels per acre from a pre-harvest sample of ears and kernel counts.

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chemistry biology

Cow Gestation Calculator

Estimate a cow calving date range and postpartum interval from the number of days since breeding.

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chemistry biology

Daily Light Integral Calculator

Calculate the daily light integral (DLI) a plant receives from light intensity and daily light duration.

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chemistry biology

Dihybrid Cross Calculator

Predict offspring genotype probabilities for two independent genes at once from two parent genotypes.

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chemistry biology

Dilution Calculator (C1V1=C2V2)

Calculate the final volume needed to dilute a stock solution to a target concentration.

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chemistry biology

Dilution Ratio Calculator

Calculates how much concentrate and water are needed to mix a cleaning or chemical product at a given X:Y dilution ratio.

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chemistry biology

DNA Concentration Calculator

Calculate nucleic acid concentration from a 260nm absorbance reading using the Beer-Lambert law.

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chemistry biology

DNA Copy Number Calculator

Calculate the number of DNA molecule copies in a sample based on mass and fragment length.

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chemistry biology

Dog BMI Calculator

Calculate a simplified body mass index for a dog from its weight and height.

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chemistry biology

Dog Chocolate Toxicity Calculator

Estimate chocolate toxicity risk for a dog based on body weight, chocolate type, and amount eaten. Not a substitute for veterinary advice. Contact your vet immediately if your dog has eaten chocolate.

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chemistry biology

Dog Crate Size Calculator

Calculate the minimum recommended dog crate dimensions from the dog own height and length.

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chemistry biology

Dog Harness Size Calculator

Determine the correct dog harness size category and leash width from the dog weight.

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chemistry biology

Dog Heat Cycle Calculator

Estimate the number of days until a dog next heat cycle from the days since her last cycle began.

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chemistry biology

Dog Onion Toxicity Calculator

Estimate onion toxicity risk for a dog based on body weight and amount eaten. Not a substitute for veterinary advice -- contact your vet immediately if your dog has eaten onions.

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chemistry biology

Dog Pregnancy Calculator

Estimate a dog due date range from the number of days since mating.

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chemistry biology

Dog Quality of Life Calculator

Score a dog quality of life across 6 wellbeing factors using a transparent points-based framework.

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chemistry biology

Dog Raisin Toxicity Calculator

Estimate raisin toxicity risk for a dog based on body weight and number of raisins eaten. Not a substitute for veterinary advice -- contact your vet immediately if your dog has eaten raisins.

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chemistry biology

Dog Water Intake Calculator

Calculate a dog recommended daily water intake from its weight and activity level.

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chemistry biology

Dry Matter Basis Calculator

Convert an as-fed nutrient percentage into a dry matter basis percentage, accounting for moisture content.

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chemistry biology

Feed Conversion Ratio Calculator

Calculate the feed conversion ratio for livestock from total feed consumed and total weight gained.

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chemistry biology

Fish Oil Dosage Calculator for Cats

Calculate a weight-based fish oil supplement dose for cats. Consult your veterinarian before starting any supplement.

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chemistry biology

Goat Gestation Calculator

Estimate a goat kidding date range from the number of days since breeding and breed size.

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chemistry biology

Grain Bin Calculator

Calculate the grain storage volume and capacity of a cylindrical grain bin in cubic feet and bushels.

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chemistry biology

Grain Conversion Calculator

Convert a weight of grain into bushels using the standard bushel weight for major crops.

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chemistry biology

Grass Seed Calculator

Calculate how much grass seed is needed to cover a rectangular or circular lawn area at a given coverage rate.

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chemistry biology

Growing Degree Units Calculator

Calculate daily growing degree units for a crop from the daily high and low temperature and a base temperature.

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chemistry biology

Guinea Pig Age Calculator

Convert a guinea pig age into equivalent human years using a published non-linear age chart.

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chemistry biology

Guinea Pig Pregnancy Calculator

Estimate a guinea pig due date range from the number of days since breeding.

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chemistry biology

Half-Life Decay Calculator

Calculate the remaining amount of a substance after radioactive or chemical decay over time.

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chemistry biology

Hamster Age Calculator

Convert a hamster age into equivalent human years using a published non-linear age chart.

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chemistry biology

Hardy-Weinberg Calculator

Predict expected genotype frequencies in a population at genetic equilibrium from an allele frequency.

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chemistry biology

Henderson-Hasselbalch Buffer pH Calculator

Calculate buffer solution pH using the Henderson-Hasselbalch equation.

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chemistry biology

Horse Gestation Calculator

Estimate a mare foaling date range from the number of days since mating.

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chemistry biology

Horse Weight Calculator

Estimate a horse body weight from girth, body length, height, and neck circumference measurements.

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chemistry biology

How Big Will My Cat Get Calculator

Predict a kitten adult weight from its current age and weight.

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chemistry biology

Ideal Gas Law Calculator

Calculate the volume of an ideal gas using the ideal gas law, given pressure, moles, and temperature.

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chemistry biology

Lawn Mowing Cost Calculator

Calculate the total cost of a lawn mowing job based on lawn area and a per-square-foot price.

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chemistry biology

Ligation Calculator

Calculate the mass of DNA insert needed for a cloning ligation reaction at a target insert-to-vector molar ratio.

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chemistry biology

Livestock Fence Calculator

Calculate the number of posts, wire rolls, and total material cost needed for a livestock fence.

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chemistry biology

Llama Gestation Calculator

Estimate a llama or alpaca due date range from the number of days since mating.

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chemistry biology

Log Reduction Calculator

Calculate log reduction and percentage reduction in microorganism count from initial and final CFU counts.

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chemistry biology

Metacam Dosage Calculator for Cats

Calculate a weight-based Metacam (meloxicam) dose estimate for cats. Not a substitute for veterinary advice -- always consult your veterinarian.

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chemistry biology

Molar Mass Calculator

Calculate the molar mass of a compound from its count of carbon, hydrogen, oxygen, and nitrogen atoms.

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chemistry biology

Molarity Calculator

Calculate the molarity of a solution from moles of solute and volume of solution.

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chemistry biology

Mutation Frequency Calculator

Calculate the mutation frequency in a cell culture from the number of observed mutants and total cells.

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chemistry biology

Omega-3 Dosage Calculator for Dogs

Calculate a metabolic-weight-based omega-3 supplement dose for dogs by purpose. Consult your veterinarian before starting any supplement.

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chemistry biology

Osmolarity Calculator

Calculate the osmolarity of a solution from solute concentration and dissociation factor.

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chemistry biology

PCR Annealing Temperature Calculator

Calculate the optimal PCR annealing temperature from primer and target melting temperatures.

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chemistry biology

Pet Sitter Rates Calculator

Calculate an hourly pet-sitting rate from total cost, hours per day, and number of days.

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chemistry biology

pH Calculator

Calculate the pH of a solution from its hydrogen ion concentration.

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chemistry biology

Pine Straw Calculator

Calculate how many bales of pine straw mulch are needed to cover a given area.

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chemistry biology

Plant Population Calculator

Calculate total plant population for a field from field size, plant spacing, row spacing, and walkway width.

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chemistry biology

Potting Soil Calculator

Calculate how much potting soil is needed to fill rectangular or round containers.

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chemistry biology

Protein Concentration Calculator

Calculate protein concentration from an absorbance reading using the Beer-Lambert law.

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chemistry biology

Protein Molecular Weight Calculator

Calculate the molecular weight of a 5-amino-acid peptide chain from its amino acid sequence.

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chemistry biology

Punnett Square Calculator

Predict offspring genotype probabilities for a single gene from two parent genotypes using a Punnett square.

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chemistry biology

qPCR Efficiency Calculator

Calculate qPCR amplification efficiency and amplification factor from a standard curve slope.

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chemistry biology

Rabbit Cage Size Calculator

Calculate the minimum recommended rabbit cage dimensions and daily exercise area from the rabbit own measurements.

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chemistry biology

Rabbit Gestation Calculator

Estimate a rabbit due date range from the number of days since conception.

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chemistry biology

Rat Cage Calculator

Calculate cage volume and the maximum number of pet rats it can comfortably house.

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chemistry biology

Sheep Gestation Calculator

Estimate a ewe lambing date range from the number of days since mating.

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chemistry biology

Sod Calculator

Calculate how many rolls of sod are needed and the total cost, including a waste factor allowance.

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chemistry biology

Stoichiometry Calculator

Calculate moles of product formed from a given amount of reactant using a mole ratio.

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chemistry biology

Swine Gestation Calculator

Estimate a sow farrowing date range from the number of days since breeding.

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chemistry biology

Tramadol Dosage Calculator for Dogs

Calculate a weight-based tramadol dose range for dogs, based on published BSAVA guidance. Not a substitute for veterinary advice -- tramadol should only be given when prescribed by a veterinarian.

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chemistry biology

Tree Diameter Calculator

Calculate a tree trunk diameter from its measured circumference.

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chemistry biology

Tree Height Calculator

Calculate tree height using distance and angle measurements, for trees level with, above, or below the viewer.

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chemistry biology

Tree Leaves Calculator

Estimate the total number of leaves on a tree from a sample leaf count and the tree crown size.

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chemistry biology

Tree Spacing Calculator

Calculate how many trees fit in a planting area at a given rectangular grid spacing.

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chemistry biology

Tree Value Calculator

Estimate the appraised dollar value of a tree from its circumference, height, and species value factor.

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chemistry biology

Trihybrid Cross Calculator

Predict all 27 possible offspring genotype probabilities for three independent genes at once from two parent genotypes.

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chemistry biology

Turtle Tank Size Calculator

Calculate the minimum recommended tank size for a pet turtle based on its shell length.

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chemistry biology

Vapor Pressure Deficit Calculator

Calculate vapor pressure deficit for a plant canopy from air temperature, leaf temperature, and relative humidity.

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chemistry biology

Vegetable Seed Calculator

Calculate how many vegetable seeds are needed for a row garden from row length, seed spacing, and number of rows.

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chemistry biology

Vegetable Yield Calculator

Estimate total vegetable harvest yield from the number of plants and an expected yield per plant.

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