Gallons to Cups Converter

A U.S. gallon holds 16 cups. Handy for batch cooking, homemade lemonade or working out how many servings a gallon makes.

How to use the Gallons to Cups Converter

1. Type the number of US gallons into the US gallons field. Decimals such as 0.5 are fine.
2. Read the answer in US cups. It updates as you type, with no button to press. The same amount is also shown in US qt, US pt, L.
3. To go from US cups back to US gallons, type into the US cups field instead. Every field also has a unit menu with all 27 volume units, for example L, mL, cL, dL, m³, cm³ (cc), µL, UK gal, US dry gal, US qt.

Results update as you type, and everything is calculated in your browser.

How it works

Both units measure volume, so they are always in the same ratio: one US gallon equals 16 US cups. The calculator multiplies the number of US gallons you type by 16 to give US cups, and when you type into the US cups field it divides by the same factor to give US gallons. Because the ratio never changes, doubling the US gallons always doubles the US cups, for example 2 US gal is 32 US cup.

How to convert US gallons to US cups

1. Write down the value in US gallons, for example 1 US gal.
2. Multiply by the conversion factor 16 (because 1 US gallon = 16 US cup).
3. 1 × 16 = 16 US cup.
4. To go back from US cups to US gallons, divide by 16, or multiply by 0.0625.

US gal to US cup conversion table

Volume units explained

US gallon (US gal)

The U.S. liquid gallon is exactly 231 cubic inches, about 3.785 litres. It is used for fuel, milk, water and paint in the United States.

US cup (US cup)

The U.S. customary cup is 8 U.S. fluid ounces, about 236.6 mL. Recipes from Australia, Canada and New Zealand often use the 250 mL metric cup instead.