Cups to Gallons Converter (cup to gal) + Formula
One US cup equals 0.0625 gallons — multiply cups by 0.0625 to convert to gallons. Equivalently, 16 cups make 1 gallon. To reverse it, multiply gallons by 16.
The formula
Multiply your cup value by 0.0625 (which is 1/16) to get gallons.
gal = cup × 0.0625
Example: 8 cups × 0.0625 = 0.5 gallonsBecause a US gallon contains exactly 16 cups, the factor is the simple fraction one-sixteenth.
Conversion table
| Cups | Gallons (gal) |
|---|---|
| 1 | 0.0625 |
| 2 | 0.125 |
| 4 | 0.25 |
| 5 | 0.3125 |
| 8 | 0.5 |
| 10 | 0.625 |
| 16 | 1 |
| 20 | 1.25 |
| 50 | 3.125 |
| 100 | 6.25 |
How to convert online
- Type the number of cups into the first box.
- Read the equivalent in gallons instantly in the second box.
- Enter a gallon value instead to convert back to cups.
Use the Cup to Gallon Converter — free and instant in your browser.
Where this conversion is used
Cups-to-gallons is a scaling tool for cooking and batch recipes, brewing and beverages, and household tasks like mixing cleaning solutions or measuring water, where a recipe written in cups needs to be sized up to gallon quantities for a crowd or a large container.
FAQ
How many cups are in a gallon?
There are exactly 16 US cups in one gallon, so one cup is 0.0625 gallons.
What is 8 cups in gallons?
8 cups × 0.0625 = 0.5 gallons, exactly half a gallon.
Is the conversion exact?
Yes — within the US customary system a gallon is defined as 16 cups, so 0.0625 is exact.
How do I convert gallons back to cups?
Multiply gallons by 16, or use our Gallon to Cup converter for the reverse direction.
Related converters
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