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.
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.