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Aquarium Substrate Calculator
Calculate substrate volume and mass for a rectangular aquarium with a level bed or linear slope.
- Substrate volume, L
- 15.4
- Substrate mass, kg
- 23.1
How the calculation works
Liters = length × width × (front depth + rear depth)/2/1000. Mass = liters × bulk density.
Inputs
- Base length, cm
- Base width, cm
- Front depth, cm
- Rear depth, cm
- Bulk density, kg/L
Calculation details
Enter dimensions and bed depths in centimeters. Use equal front and rear depths for a level bed.
Use the bulk density of the actual substrate. Voids, rocks, and complex contours change the amount required.
Updated: 2026-10-02