Instant, two-way conversion across common engineering units.
1 ft³ = 7.4805195 US gal(Cubic foot → US gallon)
To convert cubic feet to US gallons, multiply the value by 7.4805195. Volume conversions matter for concrete pours, excavation, tank capacity and airflow, where a rounding slip becomes a delivery error.
The cubic foot (ft³) is the standard imperial unit for bulk volume and airflow.
The US gallon is the liquid volume unit used in the United States.
1 ft³ equals 7.4805195 US gal.
Multiply the value by 7.4805195. For example, 10 ft³ equals 74.805195 US gal.
1 US gal equals 0.13368056 ft³. The converter above works in both directions, so you can type into either field.
The US gallon comes from the old English wine gallon of 231 cubic inches, while the imperial gallon was redefined in 1824. The imperial gallon is about 20 percent larger.
Cubic meters are the standard ordering unit for concrete and excavation in metric practice; cubic yards serve the same role in the US.
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