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Fish Tank Volume Calculator

Fish Tank Volume Calculator Australia

Volume

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Enter your tank dimensions to see the volume.

Did we solve your problem?

A fish tank volume calculator for Australia, with results in litres. Choose your tank shape, enter the dimensions, and get the capacity instantly.

Aquarium volume in Australia

Australia uses the metric system, so aquariums are measured in litres. Multiply the inside length, width and height in centimetres and divide by 1000 to get the volume in litres.

Volume at a glance

Drag to fill a 60 by 30 by 30 cm (54 L) tank and watch the volume change.

50% full = 27 L

How to calculate fish tank volume

Measure the length, width and height of your tank, then multiply them together. Change the values below and the diagram and the calculation update instantly.

  1. 1

    Measure length, width and height

    60 x 30 x 30 cm

  2. 2

    Multiply them for cubic centimetres

    60 x 30 x 30 = 54,000 cm³

  3. 3

    Convert to litres and gallons

    54,000 ÷ 1000 = 54 litres (14.27 US gal)

Formulas behind the fish tank volume calculator

Prefer to calculate the aquarium size by hand? Here is the volume formula for each tank shape. Click a card to try it in the calculator.

For unusual tanks, see a triangular prism volume tool, and note that spherical aquariums (fish bowls) are not recommended for keeping fish.

Aquarium shapes

Our fish tank volume calculator supports seven popular aquarium shapes. Click any shape to load it into the calculator above.

Frequently asked questions

How do I calculate fish tank volume in Australia?
Measure in centimetres, multiply the three sides, and divide by 1000 for litres. The calculator also shows gallons if you need them.
Are Australian tanks measured in litres?
Yes. Australia uses metric measurements, so tank sizes are quoted in litres.
How many litres is a 4 foot tank?
A common 4 foot tank around 120x45x45 cm holds about 243 litres, but always measure your own tank.
Does the calculator work for any unit?
Yes. Pick centimetres, inches or feet, and the result is shown in litres and gallons.
What units can I use in this calculator?
You can switch between centimetres, millimetres, inches, feet and metres at any time. Enter all dimensions in the same unit and the result updates instantly.
Does the result include substrate and decoration?
The figure is the full internal capacity. Subtract roughly 10 to 15 percent for substrate, rocks and the gap you leave at the top to estimate the real water volume.
How accurate is this fish tank calculator?
It uses the exact geometric formula for each shape, so the result is accurate for the dimensions you enter. Measure the inside of the tank for the best accuracy.
Is this calculator free to use?
Yes. It is completely free, needs no sign-up, and works on phones, tablets and desktops.

Calculator tools

Explore our specialised fish tank volume calculators, each tailored for a specific unit, shape or region.

In Gallons In Litres Tank Size Capacity Dimensions Water Volume Tank Weight In CM In MM In Inches In Feet Metric Hexagon Corner Cylinder & Round Bow-front Triangle Octagon Pentagon Surface Area UK Australia

Related guides

Learn the core ideas behind fish tank volume before or after using the calculator.