# How to Calculate Pump Efficiency?

How do you find the efficiency of a pump ?

## Pump Efficiency Step by Step Calculation

Pump efficiency is the ratio of the power imparted on the fluid by the pump in relation to the power supplied to drive the pump. Learn how to calculate efficiency of a pump/centrifugal pump using below simple steps. Formula:
Pump Efficiency (n) = WHP/BHP
Where,
WHP - Water Horse Power
BHP - Brake Horse Power Step 1: Example
Lets consider an example where the power imparted on the water by the pump is given as 12 Horse Power, and the power supplied to drive the pump is given as 15 Horse Power, then to calculate the pump efficiency, use the above formula.

Lets assign the values as below to calculate the centrifugal pump efficiency.
WHP (Water Horse Power) = 12
BHP (Brake Horse Power) = 15 Step 2: Substituting the values,
n = 12/15=0.8
To express in percentage multiply by 100.
Pump Efficiency (n) = 0.8x100=80% Calculate efficiency of pump online with brake and water horsepower (HP) using the Pump Efficiency Calculator