Pump Horsepower Calculator

How the Calculator Works

Pump hydraulic power is calculated using:

Hydraulic Power = ρ × g × Q × H
  

Where:
• ρ = Density of water (1000 kg/m³)
• g = 9.81 m/s²
• Q = Flow rate (m³/s)
• H = Total head (m)

Pump brake horsepower (BHP) accounts for efficiency:

BHP = Hydraulic Power / Efficiency
  

Example

Flow Rate: 0.04 m³/s  
Head: 15 m  
Efficiency: 0.80  

Possible Output:
Pump Horsepower = 7.36 kW