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Convert cups to US gallons
Instant, accurate cup → gal conversion with a live converter, table and formula.
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1 cup = 0.0625 US gallons
1 US gallon = 16 cups
cups to US gallons table
| cups (cup) | US gallons (gal) |
|---|---|
| 0.5 | 0.03125 |
| 1 | 0.0625 |
| 2 | 0.125 |
| 5 | 0.3125 |
| 10 | 0.625 |
| 20 | 1.25 |
| 50 | 3.125 |
| 100 | 6.25 |
| 500 | 31.25 |
| 1000 | 62.5 |
Formula
US gallons = cups × 0.0625.
Example
10 cups = 0.625 US gallons.
What is a cup?
A US cup is 236.6 ml, a standard cooking measure (8 US fl oz).
What is a US gallon?
A US gallon is 3.785 liters (128 US fluid ounces).
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 | cups | US gallons |
|---|---|---|
| Teaspoon of medicine | 0.0211 cup | 0.00132 gal |
| Soda can | 1.39 cup | 0.0872 gal |
| Water bottle | 2.11 cup | 0.132 gal |
| Car fuel tank (typical) | 211 cup | 13.21 gal |
| Bathtub | 634 cup | 39.63 gal |
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 US gallons in a cups?+
1 cup = 0.0625 US gallons.
How do I convert cups to US gallons?+
Enter the value in the cups box above and the US gallons value appears instantly. You can also type in the US gallons box to convert the other way.
Is this cup to gal converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.