Gallons to cups
One gal equals 16 cup. Type any number and the answer appears as you type — the maths happens in your browser.
Result
The same value in every unit
| Unit | Value |
|---|
- Free
- Files never leave your device
- No sign-up
Common values
| gallons | cups |
|---|---|
| 1 gal | 16 cup |
| 2 gal | 32 cup |
| 3 gal | 48 cup |
| 5 gal | 80 cup |
| 10 gal | 160 cup |
| 15 gal | 240 cup |
| 20 gal | 320 cup |
| 25 gal | 400 cup |
| 50 gal | 800 cup |
| 100 gal | 1600 cup |
| 500 gal | 8000 cup |
| 1000 gal | 16000 cup |
How to use
- Enter the number of gallons in the field.
- The result in cups updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: cup = gal × 16. Going back the other way, one cup is 0.0625 gal.
Where the odd number comes from
The factor is not a round number because the imperial units are defined through the metric ones by international agreement: an inch is exactly 25.4 mm and a pound is exactly 0.45359237 kg. Everything else follows from those definitions.
cup = gal × 16
Frequently asked questions
How many cups are in one gallons?
One gal is 16 cup.
How do I convert gallons to cups?
Multiply by the factor: cup = gal × 16.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert cups back to gallons?
One cup is 0.0625 gal — or open the reverse page linked below.