Free tool · Calculator
Tank & pipe water volume calculator
Work out how many litres a tank or pipe run holds — the number you need for disinfection dosing, flushing or drain-down.
m
The actual depth of water, not the full tank height.
m
m
m
The actual depth of water, not the full tank height.
m
In millimetres — e.g. 15, 22 or 28 for common copper.
mm
m
Read this before you dose
These are nominal full volumes from the dimensions you enter. Real standing or usable volume can differ — tanks are rarely brim-full, fittings and connected pipework add volume, and sludge or scale reduce it. Measure dimensions on site and treat the figure as a planning aid, not a substitute for a competent risk assessment.