Brake Horsepower Calculation

Please select option and enter appropriate values.

I want to calculate


Flow Rate or Discharge(Q): gpm
Total Head(H): ft
Pump Efficiency(n):
Water Horsepower(WHP): HP



The calculator can find Water Horsepower, flow rate, total head or pump efficiency as per selection and given appropriate values using following formula:


Water Horsepower (WHP) = (Q x H x 100)/ (3960 x n)


WHP = Water Horsepower,

Q = Flow Rate or Discharge,

H = Total Head.

n = Pump Efficiency.