Gallons to Cups Converter
Convert US gallons (gal) to US cups (cups) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Gallons to Cups formula
cups = gal × 16
1 US gallon = 16 US cups · 1 US cup = 0.0625 US gallons
To convert US gallons to US cups, multiply the value by 16. For example, 1 gal:
cups = 1 × 16cups = 16
So 1 gal = 16 cups.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just multiply by 16.
Gallons to Cups conversion table
Cups back to Gallons
The same values converted the other way, rounded for everyday use:
| US cups | US gallons |
|---|---|
| 4 cups | 0.25 gal |
| 8 cups | 0.5 gal |
| 16 cups | 1 gal |
| 24 cups | 1.5 gal |
| 32 cups | 2 gal |
| 48 cups | 3 gal |
| 80 cups | 5 gal |
About the units
US gallons (gal)
A US gallon is 128 US fluid ounces, exactly 3.785411784 liters. (The UK imperial gallon is 4.546 liters.)
US cups (cups)
A US customary cup is 8 US fluid ounces, about 236.6 ml. Nutrition labels use a rounded 240 ml cup; metric cups are 250 ml.
Frequently asked questions
How many US cups are in a US gallon?
One US gallon equals 16 US cups.
What is 1 Gallons in Cups?
1 gal = 16 cups.
How do I convert Cups back to Gallons?
Divide the US cups by 16.