Brake Horsepower Calculator  

Where,
Q = Flow Rate or Discharge
H = Total Head
n = Pump Efficiency
Example:
Calculate the Brake Horsepower (Water Horsepower) for the given details.
Flow Rate or Discharge (Q) = 25 gpm
Total Head (H) =15 ft
Pump Efficiency (n) = 5
Solution:
Apply Formula:
BHP = 100QH/3960n
BHP = 100*25*15/3960*5
BHP = 1.89 HP