US Gallons to Cubic Feet (gal to ft³) Converter
1 US gallon (gal) = 0.133681 cubic feet (ft³). To convert US gallons to cubic feet, multiply by 0.133681: 15 gal × 0.133681 = 2.00521 ft³.
Quick facts
- 1 gal = 0.133681 ft³
- 1 ft³ = 7.48052 gal
- Formula: ft³ = gal × 0.133681
- Quick estimate: multiply by about 0.13
How to convert US gallons to cubic feet
- Take the value in US gallons.
- Multiply it by 0.133681 (the number of cubic feet in one US gallon).
- Round the result to the precision you need.
Worked example (a car fuel tank): 15 gal × 0.133681 = 2.00521 ft³.
To convert cubic feet back to US gallons, multiply by 7.48052, or divide by 0.133681.
Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).
US Gallons to Cubic Feet conversion table
| US Gallons [gal] | Cubic Feet [ft³] |
|---|---|
| 0.01 gal | 0.0013368056 ft³ |
| 0.1 gal | 0.0133680556 ft³ |
| 1 gal | 0.1336805556 ft³ |
| 2 gal | 0.2673611111 ft³ |
| 3 gal | 0.4010416667 ft³ |
| 5 gal | 0.6684027778 ft³ |
| 10 gal | 1.3368055556 ft³ |
| 20 gal | 2.6736111111 ft³ |
| 50 gal | 6.6840277778 ft³ |
| 100 gal | 13.3680555556 ft³ |
| 1000 gal | 133.6805555556 ft³ |
gal to ft³ chart from 1 to 100
- 1 gal 0.133681 ft³
- 2 gal 0.267361 ft³
- 3 gal 0.401042 ft³
- 4 gal 0.534722 ft³
- 5 gal 0.668403 ft³
- 6 gal 0.802083 ft³
- 7 gal 0.935764 ft³
- 8 gal 1.06944 ft³
- 9 gal 1.20312 ft³
- 10 gal 1.33681 ft³
- 11 gal 1.47049 ft³
- 12 gal 1.60417 ft³
- 13 gal 1.73785 ft³
- 14 gal 1.87153 ft³
- 15 gal 2.00521 ft³
- 16 gal 2.13889 ft³
- 17 gal 2.27257 ft³
- 18 gal 2.40625 ft³
- 19 gal 2.53993 ft³
- 20 gal 2.67361 ft³
- 25 gal 3.34201 ft³
- 30 gal 4.01042 ft³
- 35 gal 4.67882 ft³
- 40 gal 5.34722 ft³
- 45 gal 6.01562 ft³
- 50 gal 6.68403 ft³
- 55 gal 7.35243 ft³
- 60 gal 8.02083 ft³
- 65 gal 8.68924 ft³
- 70 gal 9.35764 ft³
- 75 gal 10.026 ft³
- 80 gal 10.6944 ft³
- 85 gal 11.3628 ft³
- 90 gal 12.0312 ft³
- 95 gal 12.6997 ft³
- 100 gal 13.3681 ft³
Cubic Feet to US Gallons conversion table
| Cubic Feet [ft³] | US Gallons [gal] |
|---|---|
| 0.01 ft³ | 0.0748051948 gal |
| 0.1 ft³ | 0.7480519481 gal |
| 1 ft³ | 7.4805194805 gal |
| 2 ft³ | 14.961038961 gal |
| 3 ft³ | 22.4415584416 gal |
| 5 ft³ | 37.4025974026 gal |
| 10 ft³ | 74.8051948052 gal |
| 20 ft³ | 149.6103896104 gal |
| 50 ft³ | 374.025974026 gal |
| 100 ft³ | 748.0519480519 gal |
| 1000 ft³ | 7480.5194805195 gal |
US Gallons vs Cubic Feet
| US Gallon | Cubic Foot | |
|---|---|---|
| Symbol | gal | ft³ |
| Equals | 1 gal = 0.133681 ft³ | 1 ft³ = 7.48052 gal |
What is a US gallon?
A US customary unit equal to 4 quarts. Used in the US for fuel, milk, and paint.
What is a cubic foot?
The volume of a cube with 1-foot sides. Used in the US for natural gas usage and shipping volume.
Frequently asked questions
How many cubic feet are in a US gallon?
There are 0.133681 cubic feet in 1 US gallon (1 gal = 0.1336805556 ft³).
How many US gallons are in a cubic foot?
There are 7.48052 US gallons in 1 cubic foot (1 ft³ = 7.4805194805 gal).
How do I convert US gallons to cubic feet?
Multiply the number of US gallons by 0.133681. For example, 10 gal × 0.133681 = 1.33681 ft³. To convert back, multiply by 7.48052.
What is 10 gal in cubic feet?
10 gal = 1.33681 ft³.
What is 100 gal in cubic feet?
100 gal = 13.3681 ft³.
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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