Tank & Substrate Calculator
Work out your tank's water volume, then use the same footprint to figure out how much substrate you'll need to fill it.
01
Tank Volume Calculator
Enter your tank's internal dimensions in centimetres to work out how much water it holds.
Tank Dimensions
Use internal glass measurements for the most accurate result.
Water Volume
0 L
Total Volume (to the rim)
0
US Gallons
0
Imperial Gallons
0 L
Actual Water (filled ~2.5cm below rim)
0 cm²
Footprint Area
0 m²
Footprint (m²)
Actual water volume is always a little less than total volume once substrate, decor, and equipment are added — this figure just accounts for not filling all the way to the rim.
02
Substrate Calculator
Uses the footprint from your tank above to work out how much substrate you'll need at your chosen depth.
Substrate Details
Footprint (from above)
0 cm²
2.5–5cm for a flat bed, 5–8cm if sloping for an aquascape.
Substrate Needed
0 L
Volume Needed
0 kg
Approx. Weight
0
Bags Needed
Substrate density (approx.)—
Typical bag size—
Density and bag sizes vary by brand — treat this as a starting estimate and round up when buying, especially for sloped aquascapes.