Convert Cubic Feet to Gallons
1 ft³ = 7.480519 gal. Enter any value below.
Converted to every unit
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Cubic Feet to Gallons formula
gal = ft³ × 7.480519
A cubic foot is 1,728 cubic inches, about 28.32 liters. A US gallon is 231 cubic inches, exactly 3.785411784 liters.
Worked example
To convert 5 ft³, multiply by 7.480519: 5 ft³ × 7.480519 = 37.402597 gal.
Cubic Feet to Gallons conversion table
| Cubic Feet | Gallons |
|---|---|
| 1 ft³ | 7.480519 gal |
| 2 ft³ | 14.961039 gal |
| 3 ft³ | 22.441558 gal |
| 4 ft³ | 29.922078 gal |
| 5 ft³ | 37.402597 gal |
| 6 ft³ | 44.883117 gal |
| 7 ft³ | 52.363636 gal |
| 8 ft³ | 59.844156 gal |
| 9 ft³ | 67.324675 gal |
| 10 ft³ | 74.805195 gal |
| 12 ft³ | 89.766234 gal |
| 15 ft³ | 112.207792 gal |
| 20 ft³ | 149.61039 gal |
| 25 ft³ | 187.012987 gal |
| 30 ft³ | 224.415584 gal |
| 40 ft³ | 299.220779 gal |
| 50 ft³ | 374.025974 gal |
| 75 ft³ | 561.038961 gal |
| 100 ft³ | 748.051948 gal |
| 250 ft³ | 1,870.1299 gal |
| 500 ft³ | 3,740.2597 gal |
| 1,000 ft³ | 7,480.5195 gal |
Frequently asked questions
How many gallons are in a cubic foot?
1 ft³ equals 7.480519 gal.
How do I convert cubic feet to gallons?
Use the formula gal = ft³ × 7.480519. For example, 5 ft³ = 37.402597 gal.
Last reviewed: October 2026 · Uses exact, internationally defined conversion factors.