Instant, two-way conversion across common engineering units.
1 US gal = 0.13368056 ft³(US gallon → Cubic foot)
To convert US gallons to cubic feet, multiply the value by 0.13368056. Volume conversions matter for concrete pours, excavation, tank capacity and airflow, where a rounding slip becomes a delivery error.
The US gallon is the liquid volume unit used in the United States.
The cubic foot (ft³) is the standard imperial unit for bulk volume and airflow.
1 US gal equals 0.13368056 ft³.
Multiply the value by 0.13368056. For example, 10 US gal equals 1.3368056 ft³.
1 ft³ equals 7.4805195 US gal. 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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