Calculate how much water a rectangular aquarium holds from its length, width, and height. Knowing the true volume matters for dosing treatments, choosing a heater and filter, and stocking fish responsibly, because the label size on a tank is often rounded and ignores substrate and decor. Enter the three inside dimensions in centimetres or inches and the tool returns the full volume in litres and in both US and Imperial gallons, plus an estimated actual water volume that trims about ten percent for gravel, rocks, and the gap below the rim. Use the full figure for tank capacity and the actual figure for dosing and stocking. This is handy for planning a new setup or double checking a used tank. Everything is calculated in your browser, and the result is a straightforward geometric estimate.
Calculate how much water a rectangular aquarium holds from its length, width, and height. Knowing the true volume matters for dosing treatments, choosing a heater and filter, and stocking fish responsibly, because the label size on a tank is often rounded and ignores substrate and decor.
Yes. Aquarium Volume Calculator is completely free, with no sign-up and no usage limits.
Yes. Aquarium Volume Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Aquarium Volume Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.