Aquarium Substrate Calculator
Estimate the substrate volume needed for a level bed or a front-to-back slope. Enter the aquarium’s internal dimensions and an optional reserve, then add a bag volume only when the product label states litres.
Aquascape planning tool
Substrate volume planner
Estimate the substrate volume for a level or front-to-back slope. Add your bag size only if the label states a volume in litres.
Estimated volume
— US dry qt
— bags needed (rounded up)
Volume is not weight. Substrate density varies by product. This is a geometric estimate, not a planting-depth prescription.
The estimate multiplies the tank footprint by the average of the front and back depths, then adds the optional reserve. It assumes a straight, even slope and does not identify substrate chemistry, grain size or livestock suitability.
Check the exact manufacturer’s coverage and setup instructions before choosing a material or opening bags.
This is a geometric estimate, not a planting-depth prescription. Check the exact substrate manufacturer’s instructions before purchase or installation.