1 US gallon to cubic inches
1 gal = 231 in³. Change the amount below, or read the formula and the reference table further down.
1 US gallon equals
cubic inches
1 gal = 231 in³
The formula
US gallons and cubic inches both measure volume from the same zero, so a single multiplier does the job.
in³ = gal × 231
Going the other way? Convert cubic inches to US gallons.
US gallons to cubic inches table
Values either side of 1 gal.
| US gallons (gal) | Cubic inches (in³) |
|---|---|
| -4 | -924 |
| -3.5 | -808.5 |
| -3 | -693 |
| -2.5 | -577.5 |
| -2 | -462 |
| -1.5 | -346.5 |
| -1 | -231 |
| -0.5 | -115.5 |
| 0 | 0 |
| 0.5 | 115.5 |
| 1 | 231 |
| 1.5 | 346.5 |
| 2 | 462 |
| 2.5 | 577.5 |
| 3 | 693 |
| 3.5 | 808.5 |
| 4 | 924 |
| 4.5 | 1,039.5 |
| 5 | 1,155 |
| 5.5 | 1,270.5 |
| 6 | 1,386 |
Questions people ask
- How many cubic inches are in a US gallon?
- One US gallon equals 231 cubic inches.
- How do I convert US gallons to cubic inches by hand?
- Multiply the number of US gallons by 231. For a rough check, 231 is close enough for most everyday use.
- What is 1 US gallon in cubic inches?
- 1 US gallon is 231 cubic inches.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.