Plumbing Calculators
Our plumbing calculators help you size pipes correctly for water supply, central heating and combined systems. Whether you are running new pipework for a bathroom, kitchen extension, or full re-plumb, these tools take the guesswork out of pipe selection.
Each calculator factors in flow rate, pipe run length, available pressure and pipe material to recommend the right diameter — helping you avoid poor flow, noisy pipes, or wasted money on oversized pipework.
Plumbing Calculators(2)
Pipe Sizing Calculator
Calculate the correct pipe diameter for water supply, heating or combined systems based on flow rate, pipe run length, pressure and material.
Pipe Volume Calculator
Calculate the internal volume of a pipe in litres and gallons from its diameter and length, for plumbing and heating systems.