US Cups to US Gallons
Convert us cups to us gallons instantly. 1 cup = 0.0625 gal. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert us cups to us gallons
To convert us cups to us gallons, divide by 16 (multiply by 0.0625). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
gal = cup × 0.0625
US Cups to US Gallons conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| US Cups | US 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 |
| 20 cup | 1.25 gal |
| 25 cup | 1.5625 gal |
| 50 cup | 3.125 gal |
| 100 cup | 6.25 gal |
| 500 cup | 31.25 gal |
| 1,000 cup | 62.5 gal |
What is a us cup?
8 US fluid ounces. The standard American recipe measure.
What is a us gallon?
Exactly 231 cubic inches — smaller than the imperial gallon.
The formula
gal = cup × 0.0625
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the US Cups to US Gallons
- Type the number of us cups you want to convert.
- Read the result in us gallons straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked us gallons to us cups page.
US Cups to US Gallons — frequently asked questions
How many us gallons are in a us cup?
One us cup equals 0.0625 gal. gal = cup × 0.0625
What is the formula to convert us cups to us gallons?
The formula is gal = cup × 0.0625. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert us gallons back to us cups?
Divide instead of multiplying: one us gallon is 16 cup. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this us cups to us gallons free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error