Aquarium Volume Calculators
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.
Convert inches to Centimetres
If you prefer to measure in inches use the converter below to change your measurements to centimetresIN x 2.54 = CM | FT x 30.48 = CM
Rectangular / Square tanks
Cylindrical fish tanks
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:
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