Aquarium Volume Calculators

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Knowing your aquarium's volume is vital when using treatments or working out stocking values. Use these aquarium volume calculators to help

It is a good idea to write down your volume and keep it somewhere safe (e.g. on the inside of your aquarium cabinet door)

You can take off roughly 10% of your volume to account for decor (rocks, gravel etc.) and space above the water line.

Choose your tank shape from the calculators below, enter your tanks measurements in centimetres (cm) and click 'calculate' to work out your tanks volume.

BUY A NEW FISH TANK?


How do you calculate volume for an odd shaped fish tank?

Fish tanks come in all shapes and sizes, our volume calculators below cater for most known shapes. Choose the tank that's nearest to the shape of your own, enter the details and calculate the volume. It's that simple.

Convert inches to Centimetres For Your Aquarium

If you prefer to measure in inches use the converter below to change your measurements to centimetres

IN x 2.54 = CM | FT x 30.48 = CM

Calculate Fishtank Volume For Rectangular / Square tanks

diagram of rectangle tank
Width (cm)
Length (cm)
Height (cm)

Your fish tank volume is:
Litres
Imperial Gallons
US Gallons

Calculate Fishtank Volume For Cylindrical fish tanks

diagram of cylindrical tank

Diameter (cm)
Height (cm)

Your fish tank volume is:
Litres
Imperial Gallons
US Gallons

Calculate Fishtank Volume for Corner tanks

diagram of corner tank
Distance A (cm)
Distance B (cm)
Height (cm)

Your fish tank volume is:
Litres
Imperial Gallons
US Gallons

Fishtank Volume Calculator Hexagon tanks

diagram of hexagon tank
Distance A (cm)
Distance B (cm)
Height (cm)

Your fish tank volume is:
Litres
Imperial Gallons
US Gallons

Fishtank Volume For Octagon tanks

diagram of octagon tank
Distance A (cm)
Distance B (cm)
Height (cm)

Your fish tank volume is:
Litres
Imperial Gallons
US Gallons

Fishtank Volume for Round Spherical tanks

diagram of spherical tank
Enter the circumference of your tank below to work out the radius. Radius is also half the diameter, or height, of your sphere.

Enter your radius below:
Radius (R)

Your fish tank volume for your aquarium is:
Litres
Imperial Gallons
US Gallons

Buy a new Aquarium for your home

Looking to buy a new fish tank or aquarium? Check out our partner link for a great selection of aquariums of all different shapes and sizes. Most new aquaria will also state the volume and dimensions so you'll have a head start.


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