Volume
in³togal (US)
Convert cubic inches (in³) to US gallons (gal (US)).
Factor1 in³ = 0.004329004 gal (US)
Converter
in³
Accepts numbers or expressions, e.g. 150 + 14.7
Result
gal (US)
Rendered to 6 significant figures.
Formula
Formula
gal (US) = in³ × 0.004329004
Multiply any value in cubic inches by 0.004329004 to obtain the value in US gallons.
Worked example
Convert 1000 in³ to gal (US).
- 01Start with 1000 in³.
- 02Multiply by the conversion factor: 1000 × 0.004329004 = 4.329 gal (US).
Result1000 in³ = 4.329 gal (US)
Conversion table
| in³ | gal (US) |
|---|---|
| 1 | 0.004329 |
| 2 | 0.008658 |
| 5 | 0.021645 |
| 10 | 0.04329 |
| 20 | 0.08658 |
| 50 | 0.21645 |
| 100 | 0.4329 |
| 200 | 0.8658 |
| 500 | 2.1645 |
| 1000 | 4.329 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from in³ to gal (US)?
1 in³ equals 0.004329004 gal (US). To convert, multiply the value in cubic inches by 0.004329004.
How do I convert 1 in³ to gal (US)?
1 in³ = 0.004329 gal (US). For any value, multiply by 0.004329004.
How do I convert gal (US) back to in³?
Divide by the same factor — or equivalently, multiply by 231. So 1 gal (US) = 231 in³.
When would I need to convert cubic inch to US gallon?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).