Aquarium Volume Calculator

Work out aquarium volume instantly with clear inputs, formula shown and shareable results.

About Aquarium Volume Calculator

Multiplies the internal dimensions by the actual water depth, and converts the volume into gallons and the mass of water.

Formula

Tank volume

Litres = length (cm) x width (cm) x water depth (cm) / 1000; one litre of fresh water weighs one kilogram

Worked example

With the default values below, Aquarium Volume Calculator returns Water volume of 270.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Lengthaccepts 5–500 cm: 120 cm
Widthaccepts 5–300 cm: 45 cm
Water depthaccepts 2–300 cm: 50 cm

Results

Water volume: 270.00 L
Volume: 71.33 US gal
Volume: 59.39 imp gal
Water mass: 270.00 kg

Step by step

1Values used
2Tank volume
3Water volume= 270.00 L
4Volume= 71.33 US gal
5Volume= 59.39 imp gal
6Water mass= 270.00 kg

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why use water depth rather than tank height?

Tanks are never filled to the rim, and substrate and rock displace water, so actual depth gives the usable volume.

Why does mass matter?

A 270 litre tank holds about 270 kg of water plus glass and substrate, which few pieces of household furniture can carry.