Cubic Feet to Gallons Converter
Convert cubic feet to US gallons, imperial gallons, and liters. Enter the volume in cubic feet for tank and aquarium sizing.
Independently verified for accuracy
Calculator by Toolsloft ↗- US gallons
- 7.480519
- Imperial gallons
- 6.228835
- Liters
- 28.316847
Convert cubic feet to gallons for tanks, aquariums, and water heaters. Enter the volume in cubic feet and get US gallons, imperial gallons, and liters. Useful when a container is measured in feet but you need its capacity in gallons.
How this is calculated
One cubic foot equals 0.3048^3 cubic meters, which is exactly 28.316846592 liters. Gallons come from dividing the liters by the liters in a gallon: 3.785411784 for the US gallon and 4.54609 for the imperial gallon.
How to use
- Enter the volume in cubic feet.
- Read the result in US gallons.
- Check imperial gallons or liters if you need them.
Examples
- 1 cubic foot:
1 ft3 = 7.48 US gallons - 10 cubic feet:
10 ft3 = 74.81 US gallons
FAQ
- How many gallons are in a cubic foot?
- One cubic foot holds about 7.48 US gallons or 6.23 imperial gallons.
- Which gallon should I use?
- Use US gallons in the United States and imperial gallons in the UK. The tool shows both so you can pick the right one.
- How do I find a tank volume in cubic feet first?
- For a rectangular tank, multiply length by width by height in feet. For a cylinder, use pi times radius squared times height in feet.