Cups to Gallons
Type a value in either box to convert between cups and gallons. The factor is 0.0625.
| Cups | Gallons |
|---|---|
| 1 cup | 0.0625 gal |
| 2 cup | 0.125 gal |
| 3 cup | 0.1875 gal |
| 5 cup | 0.3125 gal |
| 10 cup | 0.625 gal |
| 25 cup | 1.5625 gal |
| 50 cup | 3.125 gal |
| 100 cup | 6.25 gal |
How to use
- Enter a value in the Cups field.
- The Gallons figure appears immediately — no button to press.
- Typing in the Gallons field converts back to Cups the same way.
- Use the reference table for the values that come up most often.
Cups to Gallons formula
Converting cups to gallons is a single multiplication by 0.0625.
gal = cup × 0.0625
Put another way, one cup is exactly 1/16 of a gallon.
Why this factor: the cup and the gallon are both defined against the liter, so dividing one definition by the other gives 0.0625 directly. Both definitions are set out in full below.
To go the other way, divide by 0.0625 — or use the Gallons to Cups converter, which is the same calculation reversed.
Worked example
Take 2 cup and multiply by the factor 0.0625: the result is 0.125 gal.
2 cup × 0.0625 = 0.125 gal
The converter above does this for any value you type, in either direction.
What is a cup?
A US customary cup is the standard cooking volume measure in American recipes.
Definition: Exactly one sixteenth of a US liquid gallon, so exactly 236.5882365 milliliters.
Where it is used: American recipes and baking, where dry and liquid ingredients alike are measured by cup.
Worth knowing: Nutrition labels use the US *legal* cup of exactly 240 mL, and a metric cup is 250 mL — three slightly different cups are in circulation.
What is a gallon?
A US liquid gallon is the standard large-volume unit in the United States.
Definition: Defined as exactly 231 cubic inches, which works out to exactly 3.785411784 liters.
Where it is used: Fuel sales, milk and beverage containers, and paint in the US.
Worth knowing: The imperial gallon used in the UK and Canada is about 20% larger, at 4.54609 L — so 'miles per gallon' figures are not comparable between the two.
Cups vs Gallons
The cup and the gallon belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many gallons are in a cup?
One cup equals 0.0625 gallons.
What is the formula to convert cups to gallons?
Multiply the number of cups by 0.0625. To reverse it, divide by 0.0625 instead.
How do I convert gallons back to cups?
Divide by 0.0625, which is the same as multiplying by 16.
How many gallons are in 10 cups?
10 cup works out to 0.625 gal.
Is there anything to watch out for with cups?
Nutrition labels use the US *legal* cup of exactly 240 mL, and a metric cup is 250 mL — three slightly different cups are in circulation.
How is the cup defined?
Exactly one sixteenth of a US liquid gallon, so exactly 236.5882365 milliliters.