1 cubic inch to US gallons
1 in³ = 0.004329 gal. Change the amount below, or read the formula and the reference table further down.
1 cubic inch equals
US gallons
1 in³ = 0.004329 gal
The formula
Cubic inches and US gallons both measure volume from the same zero, so a single multiplier does the job.
gal = in³ × 0.0043290043
Going the other way? Convert US gallons to cubic inches.
Cubic inches to US gallons table
Values either side of 1 in³.
| Cubic inches (in³) | US gallons (gal) |
|---|---|
| -4 | -0.017316 |
| -3.5 | -0.015152 |
| -3 | -0.012987 |
| -2.5 | -0.010823 |
| -2 | -0.008658 |
| -1.5 | -0.006494 |
| -1 | -0.004329 |
| -0.5 | -0.002165 |
| 0 | 0 |
| 0.5 | 0.002165 |
| 1 | 0.004329 |
| 1.5 | 0.006494 |
| 2 | 0.008658 |
| 2.5 | 0.010823 |
| 3 | 0.012987 |
| 3.5 | 0.015152 |
| 4 | 0.017316 |
| 4.5 | 0.019481 |
| 5 | 0.021645 |
| 5.5 | 0.02381 |
| 6 | 0.025974 |
Questions people ask
- How many US gallons are in a cubic inch?
- One cubic inch equals 0.0043290043 US gallons.
- How do I convert cubic inches to US gallons by hand?
- Multiply the number of cubic inches by 0.0043290043. For a rough check, 0.004 is close enough for most everyday use.
- What is 1 cubic inch in US gallons?
- 1 cubic inch is 0.004329 US gallons.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.