Compute the water volume of a rectangular aquarium in liters and gallons.
A cubic centimeter holds one milliliter, so the three dimensions divide by 1000 to give liters, then convert to gallons. Volume drives heater wattage, filter size, dosing and stocking, so measuring the tank correctly prevents equipment mistakes.
Fish Tank Volume
Volume = length x width x height (cm) / 1000 for liters
Volume = length x width x height (cm) / 1000 for liters A cubic centimeter holds one milliliter, so the three dimensions divide by 1000 to give liters, then convert to gallons.
Volume drives heater wattage, filter size, dosing and stocking, so measuring the tank correctly prevents equipment mistakes.
This calculator takes 3 inputs: Length, Width, Height. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.