Aquarium Calculator

Use Fishician's free Aquarium Calculator to work from the measurements you enter when estimating volume, substrate, and water-change quantities.

What this tool does

• Estimate aquarium volume from entered dimensions.
• Estimate substrate quantities for a planned depth.
• Calculate water-change quantities with visible units.

Important boundary

Measurements and actual filled water volume can differ because of substrate, decor, displacement, and manufacturer tolerances.

Browse all public aquarium tools. The interactive Aquarium Calculator loads automatically when JavaScript is available.