Cubic Inches to US Gallons (in³ to gal) Converter
1 cubic inch (in³) = 0.004329 US gallons (gal). To convert cubic inches to US gallons, multiply by 0.004329: 25 in³ × 0.004329 = 0.108225 gal.
Quick facts
- 1 in³ = 0.004329 gal
- 1 gal = 231 in³
- Formula: gal = in³ × 0.004329
- Quick estimate: multiply by about 0.0043
How to convert cubic inches to US gallons
- Take the value in cubic inches.
- Multiply it by 0.004329 (the number of US gallons in one cubic inch).
- Round the result to the precision you need.
Worked example: 25 in³ × 0.004329 = 0.108225 gal.
To convert US gallons back to cubic inches, multiply by 231, or divide by 0.004329.
Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).
Cubic Inches to US Gallons conversion table
| Cubic Inches [in³] | US Gallons [gal] |
|---|---|
| 0.01 in³ | 0.00004329 gal |
| 0.1 in³ | 0.0004329004 gal |
| 1 in³ | 0.0043290043 gal |
| 2 in³ | 0.0086580087 gal |
| 3 in³ | 0.012987013 gal |
| 5 in³ | 0.0216450216 gal |
| 10 in³ | 0.0432900433 gal |
| 20 in³ | 0.0865800866 gal |
| 50 in³ | 0.2164502165 gal |
| 100 in³ | 0.4329004329 gal |
| 1000 in³ | 4.329004329 gal |
in³ to gal chart from 1 to 100
- 1 in³ 0.004329 gal
- 2 in³ 0.00865801 gal
- 3 in³ 0.012987 gal
- 4 in³ 0.017316 gal
- 5 in³ 0.021645 gal
- 6 in³ 0.025974 gal
- 7 in³ 0.030303 gal
- 8 in³ 0.034632 gal
- 9 in³ 0.038961 gal
- 10 in³ 0.04329 gal
- 11 in³ 0.047619 gal
- 12 in³ 0.0519481 gal
- 13 in³ 0.0562771 gal
- 14 in³ 0.0606061 gal
- 15 in³ 0.0649351 gal
- 16 in³ 0.0692641 gal
- 17 in³ 0.0735931 gal
- 18 in³ 0.0779221 gal
- 19 in³ 0.0822511 gal
- 20 in³ 0.0865801 gal
- 25 in³ 0.108225 gal
- 30 in³ 0.12987 gal
- 35 in³ 0.151515 gal
- 40 in³ 0.17316 gal
- 45 in³ 0.194805 gal
- 50 in³ 0.21645 gal
- 55 in³ 0.238095 gal
- 60 in³ 0.25974 gal
- 65 in³ 0.281385 gal
- 70 in³ 0.30303 gal
- 75 in³ 0.324675 gal
- 80 in³ 0.34632 gal
- 85 in³ 0.367965 gal
- 90 in³ 0.38961 gal
- 95 in³ 0.411255 gal
- 100 in³ 0.4329 gal
US Gallons to Cubic Inches conversion table
| US Gallons [gal] | Cubic Inches [in³] |
|---|---|
| 0.01 gal | 2.31 in³ |
| 0.1 gal | 23.1 in³ |
| 1 gal | 231 in³ |
| 2 gal | 462 in³ |
| 3 gal | 693 in³ |
| 5 gal | 1155 in³ |
| 10 gal | 2310 in³ |
| 20 gal | 4620 in³ |
| 50 gal | 11550 in³ |
| 100 gal | 23100 in³ |
| 1000 gal | 231000 in³ |
Cubic Inches vs US Gallons
| Cubic Inch | US Gallon | |
|---|---|---|
| Symbol | in³ | gal |
| Equals | 1 in³ = 0.004329 gal | 1 gal = 231 in³ |
What is a cubic inch?
The volume of a cube with 1-inch sides. Used in the US for small mechanical parts and engine displacement.
What is a US gallon?
A US customary unit equal to 4 quarts. Used in the US for fuel, milk, and paint.
Frequently asked questions
How many US gallons are in a cubic inch?
There are 0.004329 US gallons in 1 cubic inch (1 in³ = 0.0043290043 gal).
How many cubic inches are in a US gallon?
There are 231 cubic inches in 1 US gallon (1 gal = 231 in³).
How do I convert cubic inches to US gallons?
Multiply the number of cubic inches by 0.004329. For example, 10 in³ × 0.004329 = 0.04329 gal. To convert back, multiply by 231.
What is 10 in³ in US gallons?
10 in³ = 0.04329 gal.
What is 100 in³ in US gallons?
100 in³ = 0.4329 gal.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units)). Results are shown to up to 10 decimal places; round them to suit your purpose.
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