Aquarium Volume Calculator
How many litres fit in a rectangular, cube or cylindrical fish tank. Subtract substrate for the real "water" volume.
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How many litres fit in a rectangular, cube or cylindrical fish tank. Subtract substrate for the real "water" volume.
How to use Aquarium Volume Calculator
- Open the toolNo signup and nothing to install; it works as soon as the page loads.
- Set “Shape”
- Set “Length (cm)”
- Set “Width (cm)”
- Set “Height (cm)”
- Read the resultChange any input and the result is recalculated immediately.
Worked example with the defaults
- AQUARIUM VOLUME · 60 × 30 × 36 cm
- 64.8 L
Nothing you enter leaves your device
All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.
That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.
What this tool does not do
Aquarium Volume Calculator only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.
It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.
Frequently Asked Questions
- What about substrate?
- Sand or gravel displaces roughly 5-10% of the volume. Use the height minus substrate depth for a truer water value.