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Brake Horsepower is defined as the actual or useful horsepower of an engine that is determined from a force exerted on a friction brake. Here the horsepower of an engine is recorded on a device called dynamometer. The advanced online Brake Horsepower Calculator is useful in calculating the brake horsepower of an engine by using the formula.

Brake Horsepower Calculator

Table of Contents:

**Formula**

**BHP = 100QH/3960n**

**Where,**

Q = Flow Rate or Discharge

H = Total Head

n = Pump Efficiency

The Brake Horsepower is termed as the dynamometer connected to the drive shaft.

__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**