To convert cubic inches to US gallons, multiply the value by 0.004329. To go the other way, multiply US gallons by 231 to get cubic inches.
| Cubic Inches (in³) | US Gallons (gal) |
|---|---|
| 1 in³ | 0.004329 gal |
| 2 in³ | 0.00865801 gal |
| 5 in³ | 0.021645 gal |
| 10 in³ | 0.04329 gal |
| 20 in³ | 0.0865801 gal |
| 50 in³ | 0.21645 gal |
| 100 in³ | 0.4329 gal |
| 500 in³ | 2.1645 gal |
| 1,000 in³ | 4.329 gal |
Cubic inch (in³). A cubic inch is 16.387 mL, used for engine displacement in the US.
US gallon (gal). The US liquid gallon is 231 cubic inches, exactly 3.785411784 liters.
There are 0.004329 US gallons in one cubic inch.
Multiply the number of cubic inches by 0.004329. For example, 10 cubic inches equal 0.04329 US gallons.
One US gallon equals 231 cubic inches.