Pump Power Calculator

This calculator estimates the head loss through a pipe based on the Darcy-Weisbach equation. (Only Applicable for 5000< Re<10^8)

Flow Rate (L/s) Diameter (mm) Length of Pumping Main (m) Level difference between extreme points (m) Height of reservoir (m) Residual head (m) Pipe Roughness (mm) Minor Headloss in % of friction loss(%) Pump Efficiency (%) Motor Efficiency (%) Calculate

Velocity: m/s, Reynolds Number: , friction factor: , Economical Diameter: mm

Pipe Friction loss: m, Minor headloss: m

Total losses: m; Loss Ratio(Total loss/Level difference): %

Combined efficiency (np*nm): %

Total Dynamic head (TDH): m

Power Required by pump: kW or HP

Pipe Material	Diameter (mm)	Roughness (mm)
Galvanized iron	15-100	0.15-0.25
PVC	15-200	0.0015-0.007
Copper	15-100	0.0015-0.005
Stainless steel	15-100	0.015-0.030
Concrete	150-3000	0.3-3.0
Asbestos cement	150-3000	0.1-1.0
Cast iron	15-100	0.26-0.61
Brass	15-100	0.0015-0.003