US gallons to Cubic feet
Type a value in US gallons and get the result in Cubic feet, calculated exactly.
10 US gallons ≈ 1.336805556 Cubic feet
Precision
Exact factorRounded for display to about 10 significant digits.
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Formula
ft³ = gal (US) × 0.133680555556
To convert US gallons to Cubic feet, multiply the value by 0.133680555556.
Worked examples
- 1 gal (US) × 0.133680555556 ≈ 0.1336805556 ft³
- 10 gal (US) × 0.133680555556 ≈ 1.336805556 ft³
- 100 gal (US) × 0.133680555556 ≈ 13.36805556 ft³
This factor is exact by definition.
Conversion table
| US gallons (gal (US)) | Cubic feet (ft³) |
|---|---|
| 1 | ≈ 0.1336806 |
| 2 | ≈ 0.2673611 |
| 3 | ≈ 0.4010417 |
| 4 | ≈ 0.5347222 |
| 5 | ≈ 0.6684028 |
| 6 | ≈ 0.8020833 |
| 7 | ≈ 0.9357639 |
| 8 | ≈ 1.069444 |
| 9 | 1.203125 |
| 10 | ≈ 1.336806 |
| 15 | ≈ 2.005208 |
| 20 | ≈ 2.673611 |
| 25 | ≈ 3.342014 |
| 30 | ≈ 4.010417 |
| 40 | ≈ 5.347222 |
| 50 | ≈ 6.684028 |
| 60 | ≈ 8.020833 |
| 70 | ≈ 9.357639 |
| 75 | ≈ 10.02604 |
| 80 | ≈ 10.69444 |
| 90 | 12.03125 |
| 100 | ≈ 13.36806 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Cubic feet to US gallons
| Cubic feet (ft³) | US gallons (gal (US)) |
|---|---|
| 1 | ≈ 7.480519 |
| 2 | ≈ 14.96104 |
| 3 | ≈ 22.44156 |
| 4 | ≈ 29.92208 |
| 5 | ≈ 37.4026 |
| 6 | ≈ 44.88312 |
| 7 | ≈ 52.36364 |
| 8 | ≈ 59.84416 |
| 9 | ≈ 67.32468 |
| 10 | ≈ 74.80519 |
| 15 | ≈ 112.2078 |
| 20 | ≈ 149.6104 |
| 25 | ≈ 187.013 |
| 30 | ≈ 224.4156 |
| 40 | ≈ 299.2208 |
| 50 | ≈ 374.026 |
| 60 | ≈ 448.8312 |
| 70 | ≈ 523.6364 |
| 75 | ≈ 561.039 |
| 80 | ≈ 598.4416 |
| 90 | ≈ 673.2468 |
| 100 | ≈ 748.0519 |
Unit definitions
- US gallons gal (US)
- Exactly 231 cubic inches, or 3.785411784 litres.
- Cubic feet ft³
- A cube one foot on each side: exactly 28.316846592 litres.
Questions people ask
US gallons to Cubic feet: what is the conversion factor?
One gal (US) is ≈ 0.1336805556 ft³.
How do I convert US gallons to Cubic feet?
Use the formula above. For example, 10 gal (US) = ≈ 1.336805556 ft³.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.