Free · Unit conversions
US & Imperial Gallons to Cubic Feet Converter
Convert us & imperial gallons to cubic feet with explained unit conventions and editable results.
- Formula & worked example
- Private in your browser
- No signup
Calculator inputs
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How to use this calculator
- Enter the known values in the units shown. Results update as you type.
- Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
- Use the worked example to check the method. Reset restores the starting fields.
Private by default
Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.
Formula and method
7.480519480519480519480519480519480519480519480519480519480519481 US gal = 1 ft³. The same volume has different numeric values in US and imperial gallons. The US gallon is 231 cubic inches; the imperial gallon is 4.54609 liters.
7.480519480519480519480519480519480519480519480519480519480519481 US gal = 1 ft³
Worked example
Enter these known values and leave the other values blank.
- Cubic feet
- 1 cu ft
- US gallons
- 7.48 US gal
- UK gallons
- 6.229 UK gal
Assumptions and limitations
- The same volume has different numeric values in US and imperial gallons. The US gallon is 231 cubic inches; the imperial gallon is 4.54609 liters.
- Changing a unit preserves the underlying quantity. Check the selected unit before entering a new number; rounded display digits do not improve measurement accuracy.
Common questions
Which unit definition does this tool use?
The same volume has different numeric values in US and imperial gallons. The US gallon is 231 cubic inches; the imperial gallon is 4.54609 liters.
Can I calculate in reverse?
Yes. Leave the original input blank and enter the known result. The inverse calculation uses the same unit definition.
References
Bookify replaces the captured rounded US gallon with the exact 3.785411784-liter definition.
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