How do you calculate tank size?

Tank size is usually based on the tank's internal dimensions. For rectangular tanks, multiply length x width x height. For cylindrical tanks, use pi x radius^2 x height.

How do I convert tank volume to gallons?

If you calculate volume in cubic feet, multiply by 7.4805 for US gallons. If you calculate in liters, divide by 3.785 to get gallons.

Can I use this tank size calculator for aquariums?

Yes. The same volume formulas work for aquariums, water tanks, and many storage tanks as long as the shape is rectangular or cylindrical.

What is the formula for a rectangular tank?

Use Volume = length x width x height .

What is the formula for a cylindrical tank?

Use Volume = pi x radius^2 x height .

Does fill level matter for tank size?

Yes. If a tank is not full, the usable volume is lower than the total tank capacity. This calculator shows total capacity unless you adjust the dimensions to the filled level.

How many liters are in 1 cubic meter?

One cubic meter equals 1,000 liters .

How accurate is a tank volume calculator?

It is accurate for simple shapes when the measurements are accurate. Real tanks with rounded edges, sloped bottoms, or obstructions may hold slightly less.

Tank Size Calculator

Calculate tank volume for rectangular and cylindrical tanks. Get results in liters, gallons, and cubic feet.

Length

Width

Height

Volume 72.0 cu ft

US Gallons 538.6 gal

Liters 2,037.9 L

Frequently Asked Questions

: Tank size is usually based on the tank's internal dimensions. For rectangular tanks, multiply length x width x height. For cylindrical tanks, use pi x radius^2 x height.
: If you calculate volume in cubic feet, multiply by 7.4805 for US gallons. If you calculate in liters, divide by 3.785 to get gallons.
: Yes. The same volume formulas work for aquariums, water tanks, and many storage tanks as long as the shape is rectangular or cylindrical.
: Use Volume = length x width x height.
: Use Volume = pi x radius^2 x height.
: Yes. If a tank is not full, the usable volume is lower than the total tank capacity. This calculator shows total capacity unless you adjust the dimensions to the filled level.
: One cubic meter equals 1,000 liters.
: It is accurate for simple shapes when the measurements are accurate. Real tanks with rounded edges, sloped bottoms, or obstructions may hold slightly less.