The cubic foot
The cubic foot equals exactly 28.316846592 liters (0.3048 m cubed). It is the standard unit for US refrigerator and freezer capacity, natural-gas billing, and shipping-carton volume specifications.
Cubic feet to US gallons Converter
1 ft³ = 7.48052 gal (cubic foot → US gallon)
1 ft³ = 7.48052 gal
1 cubic foot equals 7.48052 US gallons. To convert cubic feet to US gallons, multiply the cubic foot value by 7.48052. For quick reference: 1 ft³ = 7.48052 gal, 5 ft³ = 37.4026 gal, 10 ft³ = 74.8052 gal, 100 ft³ = 748.052 gal.
Formula
US gallons = Cubic feet × 7.48052Quick
How to convert cubic feet to US gallons
Take your value
Start with your value in cubic feet.
Multiply by 7.48052
Multiply the cubic foot value by 7.48052. This is the exact conversion factor from cubic feet to US gallons.
Read the result
The product is your value in US gallons. For example, 5 ft³ × 7.48052 = 37.4026 gal.
Conversion formula
The exact factor from cubic feet to US gallons is 7.48052.
US gallons = Cubic feet × 7.48052
Cubic feet to US gallons conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Cubic feet (ft³) | US gallons (gal) |
|---|---|
| 0.1 ft³ | 0.74805 gal |
| 0.25 ft³ | 1.8701 gal |
| 0.5 ft³ | 3.7403 gal |
| 1 ft³ | 7.4805 gal |
| 1.5 ft³ | 11.221 gal |
| 2 ft³ | 14.961 gal |
| 2.5 ft³ | 18.701 gal |
| 3 ft³ | 22.442 gal |
| 4 ft³ | 29.922 gal |
| 5 ft³ | 37.403 gal |
| 6 ft³ | 44.883 gal |
| 7 ft³ | 52.364 gal |
| 8 ft³ | 59.844 gal |
| 9 ft³ | 67.325 gal |
| 10 ft³ | 74.805 gal |
| 12 ft³ | 89.766 gal |
| 15 ft³ | 112.21 gal |
| 20 ft³ | 149.61 gal |
| 25 ft³ | 187.01 gal |
| 30 ft³ | 224.42 gal |
| 40 ft³ | 299.22 gal |
| 50 ft³ | 374.03 gal |
| 60 ft³ | 448.83 gal |
| 75 ft³ | 561.04 gal |
| 100 ft³ | 748.05 gal |
| 125 ft³ | 935.06 gal |
| 150 ft³ | 1122.1 gal |
| 200 ft³ | 1496.1 gal |
| 250 ft³ | 1870.1 gal |
| 300 ft³ | 2244.2 gal |
| 400 ft³ | 2992.2 gal |
| 500 ft³ | 3740.3 gal |
| 600 ft³ | 4488.3 gal |
| 750 ft³ | 5610.4 gal |
| 1000 ft³ | 7480.5 gal |
| 1500 ft³ | 11221 gal |
| 2000 ft³ | 14961 gal |
| 2500 ft³ | 18701 gal |
| 3000 ft³ | 22442 gal |
| 4000 ft³ | 29922 gal |
| 5000 ft³ | 37403 gal |
| 7500 ft³ | 56104 gal |
| 10000 ft³ | 74805 gal |
| 15000 ft³ | 112208 gal |
| 20000 ft³ | 149610 gal |
| 25000 ft³ | 187013 gal |
| 30000 ft³ | 224416 gal |
| 40000 ft³ | 299221 gal |
| 50000 ft³ | 374026 gal |
| 100000 ft³ | 748052 gal |
Real-world reference
A typical US refrigerator holds 18–22 cubic feet. A standard moving box is around 3 cubic feet. In US gallons, that gives you: 1 ft³ = 7.48052 gal, 10 ft³ = 74.8052 gal, 100 ft³ = 748.052 gal.
Frequently asked questions
- How many US gallons are in 1 cubic foot?
- 1 cubic foot equals 7.48052 US gallons.
- How do I convert cubic feet to US gallons?
- Multiply the cubic foot value by 7.48052. So x ft³ × 7.48052 = the equivalent in gal.
- What is 5 cubic feet in US gallons?
- 5 cubic feet equals 37.4026 US gallons.
- What is 10 cubic feet in US gallons?
- 10 cubic feet equals 74.8052 US gallons.
- What is 100 cubic feet in US gallons?
- 100 cubic feet equals 748.052 US gallons.
- How do I convert back from US gallons to cubic feet?
- Multiply the US gallon value by 0.133681. For example, 1 gal = 0.133681 ft³.
- Is the cubic foot bigger than the US gallon?
- Yes. 1 cubic foot is larger than 1 US gallon — specifically 7.48052 times larger.
- Are these conversion factors exact?
- The underlying imperial/US unit definitions are exact; the displayed factor (7.48052) is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.
About the cubic foot and the US gallon
The US gallon
The US liquid gallon equals exactly 3.785411784 liters, defined as 231 cubic inches. It is the standard fuel and milk unit in the United States. The US gallon is about 16.7% smaller than the UK (imperial) gallon (4.54609 L), so quoting fuel economy as 'mpg' without specifying the gallon can mislead by a wide margin.