// multi-utility computation suite · offline · instant · precise
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eng.pipe-sizing Calculator
Calculates optimal pipe diameter from design flow rate and target velocity or pressure drop, selecting from standard pipe sizes. Pipe sizing is an economic optimisation — smaller pipes have lower capital cost but higher pumping energy cost over the life of the system.
Inputs
Flow M3S
Volume of fluid per unit time. Used to size pipes, pumps, and ducts.
Velocity
Speed in a specified direction (m/s). Required for momentum, kinetic energy, and wave calculations.
Length
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Pressure lost to friction as fluid moves through the pipe or system. Higher drop = more pumping power required. Reduce by using larger pipes, fewer bends, or lower flow velocity.