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Fish Tank Volume Calculator

Corner Fish Tank Volume Calculator

Volume

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Enter your tank dimensions to see the volume.

Did we solve your problem?

Calculate the volume of a corner aquarium, including curved corner bow-front tanks. Enter the dimensions and get the capacity in litres and gallons.

How corner tank volume works

Most corner tanks have a curved front and sit like a quarter of a cylinder. The volume is a fraction of the full cylinder, so the calculator applies the quarter-cylinder formula automatically.

Shape preview

Adjust the size and height to see this tank shape and its volume.

Volume ≈ — litres

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 corner fish tank volume?
Select the corner shape, enter the dimensions, and the calculator uses the quarter-cylinder formula to find the volume.
How do I calculate corner fish tank gallons?
Find the volume, then switch the result unit to US or UK gallons.
Why are corner tanks harder to measure?
Their curved front means a simple length times width times height does not apply, so a quarter-cylinder formula is used.
Are corner tanks good for fish?
Yes. They use room space efficiently and can be a healthy home when sized and filtered correctly.
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.