Aquarium Volume Calculator
Turn tank length, width, and height into litres and US gallons.
Quick answer: enter your details below and click Calculate Aquarium Volume — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Enter length, width, and height in centimetres.
- Click Calculate Aquarium Volume.
- Use the volume for stocking and dosing guides.
About this tool
Enter the tank's internal dimensions in centimetres and the tool gives volume in litres and US gallons. This is a plain volume calculation, and real water volume will be slightly less once substrate and decorations are added.
Frequently asked questions
Does substrate reduce volume?
Yes, slightly. Gravel and decorations displace water, so treat the result as a maximum.
Are US and UK gallons different?
Yes. This tool uses US gallons; a UK gallon is larger, so do not mix the two when dosing.