Substrate depth calculator
Aquarium Substrate Calculator
Estimate how much sand, gravel, or aquasoil you need from tank footprint and target substrate depth.
Dimensions in
Common footprints
40 lb
Estimated sand
Kilograms18.3 kg
Volume11.8 L
20 lb bags3
9 L bags2
Depth note
Add extra if you plan a strong rear slope, deep planted areas, or hardscape that displaces substrate. Aquasoil is lighter by volume than sand or gravel.