Fluid Ounces to Cups Converter
Unit ConversionConvert US fluid ounces to cups using the exact 8 fluid ounces per cup factor.
Cups
Equivalent volume in US cups
Found this calculator useful?
From Scratch To $10K/Month In 60 Days
This is a proven money making system that takes students by the hand to make at least $10,000 per month, every month. Students get 12 weeks of guided coaching in addition to the "MPS Super Funnel" and tools.
We value your privacy and promise not to sell or misuse your information. Here's our privacy policy.
Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Unit Conversion calculators
This calculator converts fluid ounces to cups using the exact US customary factor: divide the fluid-ounce value by 8, since 1 US cup equals exactly 8 US fluid ounces. Enter any value above for an instant result.
This factor only applies to fluid ounces, a measure of volume, not to dry ounces, a measure of weight. A cup of flour and a cup of sugar both measure exactly 8 fluid ounces by volume, but they weigh very different amounts, since flour and sugar have different densities.
A real conversion table for the most commonly searched values, the standard cup-to-fluid-ounce fractions, and a full explanation of the difference between dry and fluid ounces, are below.
Fluid ounces to cups conversion table
This table covers the fluid-ounce values people look up most often, converted to cups.
| Fluid Ounces | Cups |
|---|---|
| 4 fl oz | 0.5 cups |
| 5 fl oz | 0.625 cups |
| 8 fl oz | 1 cup |
| 10 fl oz | 1.25 cups |
| 12 fl oz | 1.5 cups |
| 16 fl oz | 2 cups |
| 24 fl oz | 3 cups |
| 32 fl oz | 4 cups |
Cup fractions in fluid ounces
These are the standard cup fractions used in most US recipes, converted to fluid ounces. For the reverse direction, use the Cups to Fluid Ounces Converter.
| Cup Fraction | Fluid Ounces |
|---|---|
| 1/8 cup | 1 fl oz |
| 1/4 cup | 2 fl oz |
| 1/3 cup | 2.67 fl oz |
| 1/2 cup | 4 fl oz |
| 2/3 cup | 5.33 fl oz |
| 3/4 cup | 6 fl oz |
| 1 cup | 8 fl oz |
Dry ounces vs fluid ounces
A fluid ounce measures volume, the space a liquid or ingredient takes up. A dry ounce measures weight, the mass of that ingredient. These are two different kinds of measurement, and they only convert into each other once you know the specific ingredient's density.
A cup always holds exactly 8 fluid ounces by volume, regardless of what is in it. But the same cup of flour weighs about 4.2 dry ounces, while a cup of granulated sugar weighs about 7.1 dry ounces, since sugar is denser than flour. For an exact, ingredient-specific weight conversion, use the Cubic Centimeters to Grams Converter, entering 236.6 cc for 1 cup.
This calculator uses the US customary cup (8 fluid ounces, about 236.6 mL). Australia and New Zealand use a metric cup of exactly 250 mL instead, and the UK does not commonly use cups as a standard cooking measurement at all.
The fluid ounces to cups formula
To convert fluid ounces to cups, divide the fluid-ounce value by 8. For example, 20 fluid ounces divided by 8 equals 2.5 cups. If you are working in metric units instead, use the Milliliters to Cups Converter.
Frequently Asked Questions
How many fluid ounces are in one cup?
There are exactly 8 US fluid ounces in one US customary cup.
How many ounces is a half cup?
Half a cup equals exactly 4 fluid ounces.
Is a dry ounce the same as a fluid ounce?
No. A fluid ounce measures volume, while a dry (or weight) ounce measures mass. They are different kinds of measurement, and one cup of a dry ingredient will weigh a different number of ounces depending on that ingredient's density.
How many dry ounces are in a cup?
It depends on the ingredient, since dry ounces measure weight and different ingredients pack differently into the same volume. A cup of flour weighs about 4.2 ounces, while a cup of granulated sugar weighs closer to 7.1 ounces, even though both fill the same 8-fluid-ounce cup.
Does the US cup match the cup used in other countries?
Not exactly. This calculator uses the US customary cup (8 fluid ounces, about 236.6 mL). Australia and New Zealand use a metric cup of exactly 250 mL instead, and the UK does not commonly use cups as a standard cooking measurement at all.
How many fluid ounces are in a gallon?
There are 128 US fluid ounces in one US gallon, which works out to 16 cups.
What is the formula to convert fluid ounces to cups?
Divide the number of fluid ounces by 8. For example, 20 fluid ounces divided by 8 equals 2.5 cups.
Spot a mistake? Tell us what's wrong.
Request a calculator. The most-requested ones get built first in our monthly batch.
Request a calculatorWant this calculator on your website?
Embed the Fluid Ounces to Cups Converter on any site — no code needed. Customize colors, remove branding, and track usage.
