How many cubic feet are in 1 US gallon?

1 US gallon equals 0.133681 ft³.

How do I convert cubic feet back to US gallons?

Use the reverse converter: 1 cubic foot equals 7.48052 gal.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert US gallons to cubic feet, multiply the value by 0.133680556.

ft³ = gal × 0.133680556

40 gal × 0.133680556 = 5.35 ft³

US Gallon (gal): Used for fuel and liquids in the United States. Exactly 3.785411784 litres (231 cubic inches).
Cubic Foot (ft³): Used for gas, storage space and appliance capacity in the US. Exactly 28.316846592 litres.

How do I convert US gallons to cubic feet?: To convert US gallons to cubic feet, multiply the value by 0.133680556.
How many cubic feet are in 1 US gallon?: 1 US gallon equals 0.133681 ft³.
How many cubic feet are in 10 US gallons?: 10 gal equals 1.33681 ft³.
How do I convert cubic feet back to US gallons?: Use the reverse converter: 1 cubic foot equals 7.48052 gal.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.