# What is the harmonic mean?

##### 1 Answer

May 17, 2018

The harmonic mean is a type of average represented by the following formula.

#### Explanation:

The **harmonic mean** is a specific type of average used when calculating averages of units or rates, such as speed speed. It is different than the arithmetic mean and is always lower.

The formula is:

For example, take the following problem.

What is the harmonic mean of 2,4,5,8,10?