Cubic Feet to Gallons Converter
Convert cubic feet (cu ft) to US gallons (gal) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Cubic Feet to Gallons formula
gal = cu ft × 7.48051948
1 cubic foot = 7.48 US gallons · 1 US gallon = 0.1337 cubic feet
To convert cubic feet to US gallons, multiply the value by 7.48051948. For example, 10 cu ft:
gal = 10 × 7.48051948gal = 74.805195
So 10 cu ft = 74.81 gal.
Mental math shortcut
Quick mental estimate: multiply by 7.5. For 10 cu ft that gives about 75 gal — within 1% of the exact answer. Use the exact formula when precision matters.
Cubic Feet to Gallons conversion table
Gallons back to Cubic Feet
The same values converted the other way, rounded for everyday use:
| US gallons | Cubic feet |
|---|---|
| 7.48 gal | 0.9999 cu ft |
| 14.96 gal | 2 cu ft |
| 37.4 gal | 5 cu ft |
| 74.81 gal | 10 cu ft |
| 149.61 gal | 20 cu ft |
| 374.03 gal | 50 cu ft |
| 748.05 gal | 100 cu ft |
About the units
Cubic feet (cu ft)
A cubic foot is 1,728 cubic inches, about 7.48 US gallons or 28.3 liters.
US gallons (gal)
A US gallon is 128 US fluid ounces, exactly 3.785411784 liters. (The UK imperial gallon is 4.546 liters.)
Frequently asked questions
How many US gallons are in a cubic foot?
One cubic foot equals 7.48 US gallons.
What is 10 Cubic Feet in Gallons?
10 cu ft = 74.81 gal.
How do I convert Gallons back to Cubic Feet?
Divide the US gallons by 7.48051948. Or use the Gallons to Cubic Feet converter.