# How do you calculate the volume of a tank in Gallons and Litres

# Fish Tank Volume Calculator

An online fish tank calc to find out the water volume which fits into your fish tank.

### How Can I Find Out How Much Water My Fish Tank Holds

**Rectangular Tanks**

The measurements are 20 inches by 12 inches by 12 inches, i.e Length 12 inches, Width 12 inches, height 20 inches

the volume is 2,880 cubic inches.

Finally, divide the cubic volume in inches by 231, as a gallon is equal to 231 cubic inches.

A 2,880 cubic-inch tank is 12.47 gallons