Plumbing & Piping Calculators: Pipe, Pump & Gas Sizing

Start from your question

What are you working out?

How much pressure will I lose along this pipe run?Pipe Pressure Drop Calculator What size water line does this group of fixtures need?Fixture Unit Sizing Calculator How much head and horsepower does my pump need?Pump Head Power Calculator What size gas pipe will feed these appliances?Natural Gas Pipe Sizing Calculator How far will a hot pipe grow, and how far apart can the supports go?Pipe Expansion Support Calculator How many gallons are in this tank at this level?Tank Volume Calculator

The calculators

All 6 plumbing & piping calculators

Water supply

Fixture Unit Sizing Calculator

Converts drainage or water fixture units to peak demand and a recommended pipe size. Use it for a first-pass plumbing pipe sizing.

Gas piping

Natural Gas Pipe Sizing Calculator

Sizes natural-gas pipe by the longest-length method from the required capacity in cubic feet per hour and the allowable pressure drop. Use it for a first-pass gas pipe sizing.

Pipe supports & expansion

Pipe Expansion Support Calculator

Computes thermal expansion, guided-cantilever loop sizing and support spacing by stress and deflection. Use it for pipe expansion and support layout.

Pipe flow & pressure

Pipe Pressure Drop Calculator

Computes pipe pressure drop and head loss by Darcy-Weisbach with the Colebrook friction factor, alongside Hazen-Williams, with velocity and Reynolds number. Use it to check a liquid pipe run.

Pumps

Pump Head Power Calculator

Computes total dynamic head, hydraulic and brake power and the NPSH margin for a pump, with the system curve. Use it to select and check a pump.

Tanks & vessels

Tank Volume Calculator

Computes full and partial volume for horizontal and vertical tanks with various heads, and a dip chart. Use it to gauge tank contents.