Conversion table
| US Gallons (gal) | US Cups (cups) |
|---|---|
| 0.25 gal | 4 |
| 0.5 gal | 8 |
| 1 gal | 16 |
| 2 gal | 32 |
| 3 gal | 48 |
| 5 gal | 80 |
| 10 gal | 160 |
| 20 gal | 320 |
How to convert Gallons to Cups
cups = gallons × 16reverse: gallons = cups ÷ 16 · 1 gallon = 4 quarts
- gallons
- US gallons you enter
- cups
- the result in US cups
- 16
- cups in one US gallon
These are US gallons. The imperial (UK) gallon is bigger and works out near 18.6 US cups, so do not mix the two systems in one recipe.
Frequently asked questions
How many cups are in a gallon?
A US gallon is 16 cups.
How many cups is half a gallon?
Half a US gallon is 8 cups.
How many cups is 5 gallons?
5 US gallons is 80 cups.
Is a gallon the same in the UK?
No. A UK imperial gallon is larger, roughly 18.6 US cups, so keep US and UK gallons separate.