How to convert gallons to cups
To convert gallons to cups, multiply by 16. Volume conversions help with recipes, fuel, beverages, aquariums and laboratory work. US customary units are used here.
Gallon to Cup conversion table
| Gallon (gal) | Cup (cup) |
|---|---|
| 0.1 gal | 1.6 cup |
| 0.5 gal | 8 cup |
| 1 gal | 16 cup |
| 2 gal | 32 cup |
| 3 gal | 48 cup |
| 4 gal | 64 cup |
| 5 gal | 80 cup |
| 10 gal | 160 cup |
| 20 gal | 320 cup |
| 25 gal | 400 cup |
| 50 gal | 800 cup |
| 100 gal | 1,600 cup |
| 500 gal | 8,000 cup |
| 1,000 gal | 16,000 cup |
About the units
Gallon (gal)
A US liquid gallon is defined as 231 cubic inches, exactly 3.785411784 liters.
Cup (cup)
A US customary cup is 8 US fluid ounces, about 236.59 mL (nutrition labels round to 240 mL).
How to use this converter
- Type the number of gallons (gal) in the input box.
- The result in cups appears instantly — no button needed.
- See the same value in every other volume unit just below.
- Use “Swap units” to convert cups back to gallons.
When you’ll use the gallon to cup conversion
Converting gallons to cups comes up more often than you might expect — for example when scaling a recipe from cups to milliliters, following cooking videos from another country, or comparing drink or fuel prices. Type your number once and you get the exact answer plus every related unit, so you don’t need to convert twice.
💡 The factor is exact and easy to remember: 1 gal = 16 cup.
Watch out for these mix-ups
- US gallons are smaller than UK (imperial) gallons — about 3.785 L vs 4.546 L.
- A US cup is 236.6 mL, but nutrition labels round it to 240 mL.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many cups are in one gallon?
One gallon equals 16 cups. 16 is the exact factor used by this converter.
How do I convert gallons to cups?
Multiply the value in gallons by 16. To go the other way, multiply cups by 0.0625.
What is 10 gal in cup?
10 gal = 160 cup. Also, 5 gal = 80 cup and 100 gal = 1,600 cup.
What is the difference between a gallon and a cup?
A US liquid gallon is defined as 231 cubic inches, exactly 3.785411784 liters. A US customary cup is 8 US fluid ounces, about 236.59 mL (nutrition labels round to 240 mL).
Is this tool free and private?
Yes — the Gallon to Cup is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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