Precision calculators
Better aquarium numbers.
Turn your tank dimensions and water-care targets into clear, practical calculations — right in your browser.
Aquarium Volume
Calculate tank capacity in gallons or liters.
DimensionsL / gal
Open calculator Heater Size
Estimate the appropriate heater wattage for your aquarium.
WattageTemperature
Open calculator Fish Stocking
Check whether your tank's stocking level is reasonable.
StockingTank size
Open calculator Water Change
Calculate water-change volumes and nitrate reduction.
Water qualityNO₃
Open calculator Aquarium Weight
Estimate the loaded weight of your aquarium.
WeightSafety
Open calculator Substrate
Work out how much aquarium substrate you need.
DepthVolume
Open calculator Aquarium Glass Thickness
Plan a conservative glass thickness for a rectangular aquarium before confirming a custom build.
Glass thicknessTank planningCustom build
Open calculator Find the right tank size first
Compare common aquarium dimensions, effective volume, and planning considerations before stocking or choosing equipment.
Fish tank sizes & dimensionsCalculations run locally in your browser.