Convert US cups to US gallons
1 US cup is 0.06 gal. One US cup is exactly 0.0625 US gallons.
One US cup is 0.0625 US gallons. To convert US cups to US gallons, multiply by 0.0625; to go the other way, divide by 0.0625 or multiply by 16. The factor is exact rather than rounded: it follows from NIST Handbook 130. Eight US fluid ounces, about 236.6 ml.
Factor checked against the defining standard · How we check
- US cups × 0.0625
1 * 0.06250.063 gal
1 US cup in every volume unit
| Unit | Value | Exact factor |
|---|---|---|
| US teaspoons | 48 tsp | × 48 |
| US tablespoons | 16 tbsp | × 16 |
| US fluid ounces | 8 fl oz | × 8 |
| US cups (as entered) | 1 cup | — |
| US pints | 0.5 pt | × 0.5 |
| US quarts | 0.25 qt | × 0.25 |
| US gallons | 0.0625 gal | × 0.0625 |
| milliliters | 236.5882365 ml | × 236.5882365 |
| liters | 0.2365882365 L | × 0.2365882365 |
| imperial gallons | 0.05204213654 gal (UK) | × 0.0520421365393 |
| imperial quarts | 0.2081685462 qt (UK) | × 0.208168546157 |
| imperial pints | 0.4163370923 pt (UK) | × 0.416337092314 |
| imperial fluid ounces | 8.326741846 fl oz (UK) | × 8.32674184629 |
| imperial gills | 1.665348369 gi (UK) | × 1.66534836926 |
| cubic millimetres | 236,588.2365 mm³ | × 236,588.2365 |
| cubic centimetres | 236.5882365 cm³ | × 236.5882365 |
| cubic inches | 14.4375 in³ | × 14.4375 |
| cubic feet | 0.008355034722 ft³ | × 0.00835503472222 |
| cubic yards | 0.0003094457305 yd³ | × 0.000309445730453 |
| cubic metres | 0.0002365882365 m³ | × 0.0002365882365 |
Factors are entered by hand from NIST Handbook 130 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert US cups to US gallons? The converter and the working
- 1.Take the measurement in US cups.
- 2.Multiply by 0.0625 — that is how many US gallons fit in one US cup.
- 3.To go back the other way, divide by 0.0625, or multiply by 16.
Worked example: 25 US cups to US gallons
- Formula
- cup × 0.0625 = gal
- Arithmetic
- 25 × 0.0625 = 1.56 gal
- Answer
- 25 cup = 1.56 gal
The factor is exact, so this figure is exact too — only the display is rounded.
US cups to US gallons conversion table
| US cups | US gallons |
|---|---|
| 1 cup | 0.06 gal |
| 2 cup | 0.13 gal |
| 3 cup | 0.19 gal |
| 4 cup | 0.25 gal |
| 5 cup | 0.31 gal |
| 6 cup | 0.38 gal |
| 7 cup | 0.44 gal |
| 8 cup | 0.5 gal |
| 9 cup | 0.56 gal |
| 10 cup | 0.63 gal |
| 12 cup | 0.75 gal |
| 15 cup | 0.94 gal |
| 20 cup | 1.25 gal |
| 25 cup | 1.56 gal |
| 50 cup | 3.13 gal |
| 100 cup | 6.25 gal |
| 200 cup | 12.5 gal |
| 300 cup | 18.75 gal |
| 500 cup | 31.25 gal |
| 1000 cup | 62.5 gal |
| 2000 cup | 125 gal |
| 5000 cup | 312.5 gal |
| 10000 cup | 625 gal |
What is a US cup?
Eight US fluid ounces, about 236.6 ml. The "legal" cup on nutrition labels is a rounded 240 ml.
What is a US gallon?
Exactly 231 cubic inches. The imperial gallon is 4.546 liters, so US and UK fuel economy figures are not comparable.
How many US gallons are in a US cup?
One US cup is 0.0625 US gallons, exactly. Going the other way, one US gallon is 16 US cups. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every volume unit here
The whole group — 20 units with their symbols and the size of each one in liters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a US cup.
Cite this page
- APA
- Rule Calculator. (2026). Convert US cups to US gallons. Rule Calculator. https://rulecalculators.com/convert/cup-to-gallon
- MLA
- "Convert US cups to US gallons." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/cup-to-gallon.
- Chicago
- Rule Calculator. "Convert US cups to US gallons." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/cup-to-gallon.
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Questions people actually ask
- How many US gallons are in a US cup?
- 0.0625. Exactly 231 cubic inches. The imperial gallon is 4.546 liters, so US and UK fuel economy figures are not comparable.
- How do I convert US gallons back to US cups?
- Divide by 0.0625, or multiply by 16 — they are the same operation.
Other volume conversions
US gallons to US cups — the same conversion the other way.