Calculator suite

Aquarium calculators

Practical calculators for setup, maintenance, stocking, and water chemistry planning.

Available tools (9)

Estimate gross and actual aquarium water volume from dimensions, fill height, substrate, displacement, and sump volume.

Estimate heater wattage from water volume, room temperature, and target temperature.

Build a freshwater stocking list and estimate bioload against tank volume and filtration.

Calculate nitrate reduction from a water change or estimate the change needed to reach a target nitrate level.

Estimate substrate volume and bag count from tank footprint, target bed depth, and bag yield.

Estimate filled aquarium weight from dimensions, material, water type, substrate, and rock.

Compare filter flow against aquarium volume and the common 4-8x turnover planning range.

Estimate dissolved CO2 from pH and carbonate hardness for planted freshwater aquariums.

Convert between salinity in ppt and specific gravity using a practical 25 C aquarium approximation.