Volume
ft³togal (US)
Convert cubic feet (ft³) to US gallons (gal (US)).
Factor1 ft³ = 7.480519 gal (US)
Converter
ft³
Accepts numbers or expressions, e.g. 150 + 14.7
Result
gal (US)
Rendered to 6 significant figures.
Formula
Formula
gal (US) = ft³ × 7.480519
Multiply any value in cubic feet by 7.480519 to obtain the value in US gallons.
Worked example
Convert 10 ft³ to gal (US).
- 01Start with 10 ft³.
- 02Multiply by the conversion factor: 10 × 7.480519 = 74.8052 gal (US).
Result10 ft³ = 74.8052 gal (US)
Conversion table
| ft³ | gal (US) |
|---|---|
| 1 | 7.4805 |
| 2 | 14.961 |
| 5 | 37.403 |
| 10 | 74.805 |
| 20 | 149.61 |
| 50 | 374.03 |
| 100 | 748.05 |
| 200 | 1496.1 |
| 500 | 3740.3 |
| 1000 | 7480.5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ft³ to gal (US)?
1 ft³ equals 7.480519 gal (US). To convert, multiply the value in cubic feet by 7.480519.
How do I convert 1 ft³ to gal (US)?
1 ft³ = 7.48052 gal (US). For any value, multiply by 7.480519.
How do I convert gal (US) back to ft³?
Divide by the same factor — or equivalently, multiply by 0.1336806. So 1 gal (US) = 0.133681 ft³.
When would I need to convert cubic foot 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?
Yes. Both ft³ and gal (US) are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).