Calculators / Tank volume
Fish Tank Volume Calculator
Measure the inside of a rectangular tank in inches to find how many gallons it holds.
10.4 gallons
About 9.0 gallons of actual water once substrate, decor and the gap below the rim are counted. The water alone weighs about 75 lbs.
How it works
Volume in US gallons is length × width × height in inches, divided by 231. A tank sold as “10 gallons” is measured to the brim with nothing in it, so the water you actually keep is usually 10 to 15 percent less once substrate, decorations and the gap below the rim are counted.
Use the real water figure when dosing water conditioner or medication, and the full figure when checking what your stand has to carry.