1 US gallon (gal (US)) = 231 cubic inches (in³). To convert, multiply by 231: in³ = gal (US) × 231. For example, 5 gal (US) = 1,155 in³.
in³ = gal (US) × 231
US gallons to cubic inches table
| US gallons (gal (US)) | Cubic inches (in³) |
|---|---|
| 1 | 231 |
| 2 | 462 |
| 3 | 693 |
| 4 | 924 |
| 5 | 1,155 |
| 10 | 2,310 |
| 20 | 4,620 |
| 25 | 5,775 |
| 50 | 11,550 |
| 100 | 23,100 |
| 250 | 57,750 |
| 500 | 115,500 |
| 1,000 | 231,000 |
The two units
US gallon (gal (US)). Exactly 231 cubic inches, about 3.785 liters.
Cubic inch (in³). A cube one inch on each side: exactly 16.387064 cubic centimeters.
Because both units are defined in terms of the same base unit, the factor 231 is exact, not a rounded measurement.
Convert US gallons to other units
- US gallons to liters — 1 gal (US) = 3.785411784 L
- US gallons to milliliters — 1 gal (US) = 3,785.411784 mL
- US gallons to cubic meters — 1 gal (US) = 0.0037854118 m³
- US gallons to US quarts — 1 gal (US) = 4 qt (US)
- US gallons to US pints — 1 gal (US) = 8 pt (US)
- US gallons to US cups — 1 gal (US) = 16 cup
- US gallons to US fluid ounces — 1 gal (US) = 128 fl oz (US)
- US gallons to US tablespoons — 1 gal (US) = 256 tbsp
- US gallons to US teaspoons — 1 gal (US) = 768 tsp
- US gallons to imperial gallons — 1 gal (US) = 0.8326741846 gal (UK)
- US gallons to imperial pints — 1 gal (US) = 6.661393477 pt (UK)
- US gallons to cubic feet — 1 gal (US) = 0.1336805556 ft³
Convert other units to cubic inches
- Cubic inches to US gallons
- Liters to cubic inches
- Milliliters to cubic inches
- Cubic meters to cubic inches
- US quarts to cubic inches
- US pints to cubic inches
- US cups to cubic inches
- US fluid ounces to cubic inches
- US tablespoons to cubic inches
- US teaspoons to cubic inches
- Imperial gallons to cubic inches
- Imperial pints to cubic inches
- Cubic feet to cubic inches
Questions people ask
- How many cubic inches are in a US gallon?
- 231, exactly.
- How do you convert US gallons to cubic inches?
- in³ = gal (US) × 231. It is the same as dividing by 0.0043290043.
- How do you convert cubic inches back to US gallons?
- gal (US) = in³ ÷ 231. See cubic inches to US gallons.
Results use the legal definitions of each unit and are checked against the Pint unit library. Display rounds to 10 significant digits. All unit conversions · More tools
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