Water Horsepower Calculator  

Flow Rate or Discharge :
Q =3960 WHP/H
Total Head / Total Dynamic Head (TDH) :
It is defined as the total equivalent height that a fluid is to be pumped, taking into account friction losses in the pipe. Sum of discharge head, suction lift, and friction loss.
H = 3960 WHP/Q
Where,
WHP = Water Horsepower,
Q = Flow Rate or Discharge,
H = Total Head.
Example:
Calculate the Water Horsepower for the given details on water pumping.
Flow Rate or Discharge (Q) = 25 gpm
Total Head (H) = 15 ft
Solution:
Apply formula:
WHP = QH/3960
WHP = 25*15/3960
WHP = 0.09 HP