Aquarium Calculators & Tools
Plan, build and maintain a healthy aquarium with our free Australian fishkeeping calculators.
Aquarium Volume Calculator
Calculate the exact volume of your tank in litres and gallons from its dimensions.
SetupFish Stocking Calculator
Estimate a safe stocking level for your tank to avoid overcrowding.
StockingWater Change Calculator
Work out how many litres to change to hit your target percentage.
MaintenanceAquarium Heater Calculator
Find the right heater wattage for your tank size and room temperature.
EquipmentFilter Flow Rate Calculator
Check whether your filter turns over the tank enough times per hour.
EquipmentAquarium Lighting Calculator
Estimate lighting needs for low, medium or high-tech planted tanks.
PlantsSubstrate Calculator
Calculate how many kilograms or litres of substrate you need.
SetupCO2 Calculator
Estimate CO2 levels from pH and KH, and target bubble rates.
PlantsAquarium Salt Calculator
Calculate aquarium salt doses for treatment or marine salinity.
TreatmentPond Volume Calculator
Estimate the volume of rectangular, round or irregular ponds.
PondFish Compatibility Checker
Check whether two species can safely share a tank.
StockingAquarium Cost Calculator
Estimate the setup and running costs of your aquarium in AUD.
SetupWater Parameter Converter
Convert between dKH/ppm, dGH/ppm, temperature and salinity units.
MaintenanceFish Growth Estimator
Estimate adult size and growth so you don't outgrow your tank.
StockingAquarium Cycling Tracker
Track the nitrogen cycle and know when your tank is safe for fish.
Setup