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Unit Conversion Calculators
Cubic Feet to Gallons Calculator
Convert a volume in cubic feet to US gallons using the exact conversion factor.
US Gallons
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About the Cubic Feet to Gallons Calculator
The cubic foot is a common unit for tank, pool and container volume in the US, while the gallon is the standard liquid volume unit. Since 1 cubic foot equals 1,728 cubic inches and 1 gallon equals 231 cubic inches, one cubic foot equals exactly 1,728/231 (about 7.4805) gallons.
Formula: Gallons = Cubic Feet × 7.480519480519481
Widely used for sizing water tanks, aquariums, septic systems and irrigation storage.
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