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Convert US gallons to cups
Instant, accurate gal → cup conversion with a live converter, table and formula.
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1 US gallon = 16 cups
1 cup = 0.0625 US gallons
US gallons to cups table
| US gallons (gal) | cups (cup) |
|---|---|
| 0.5 | 8 |
| 1 | 16 |
| 2 | 32 |
| 5 | 80 |
| 10 | 160 |
| 20 | 320 |
| 50 | 800 |
| 100 | 1600 |
| 500 | 8000 |
| 1000 | 16000 |
Formula
cups = US gallons × 16.
Example
10 US gallons = 160 cups.
What is a US gallon?
A US gallon is 3.785 liters (128 US fluid ounces).
What is a cup?
A US cup is 236.6 ml, a standard cooking measure (8 US fl oz).
Real-world reference points
A liter is a large water bottle; a US cup is a small glass; a teaspoon is a sip of medicine.
| Reference | US gallons | cups |
|---|---|---|
| Teaspoon of medicine | 0.00132 gal | 0.0211 cup |
| Soda can | 0.0872 gal | 1.39 cup |
| Water bottle | 0.132 gal | 2.11 cup |
| Car fuel tank (typical) | 13.21 gal | 211 cup |
| Bathtub | 39.63 gal | 634 cup |
Mistakes to avoid with volume conversions
- US vs imperial gallons: the imperial gallon is ~20% larger — UK fuel-economy figures aren't US ones.
- Converting milliliters to grams for ingredients that aren't water — oil, flour and honey have different densities.
- US recipe cups (236.6 ml) vs metric cups (250 ml) — a 5% error that ruins delicate baking.
Frequently asked questions
How many cups in a US gallons?+
1 US gallon = 16 cups.
How do I convert US gallons to cups?+
Enter the value in the US gallons box above and the cups value appears instantly. You can also type in the cups box to convert the other way.
Is this gal to cup converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.