Pump horsepower
Sizes a pump from flow and total dynamic head, returning water horsepower, brake (shaft) horsepower at the given pump efficiency, and shaft kW.
Inputs
−
%
%
Pump efficiency drives brake horsepower. A blank or zero entry is rejected so the result is never an idealized 100 percent figure. Flow and head convert to gpm and ft internally; the formula itself is unchanged.
Result
0
BHPbrake horsepower
.
.
Water HP0 hp
Shaft power0 kW
Motor input0 hp
Motor input0 kW
Formula applied
WHP = q · h · SG / 3960 | BHP = WHP / (ηp/100) | kW = BHP · 0.746 | motor in = BHP / (ηm/100) | q in gpm, h in ft