Enter the synchronous speed (RPM) and the rotational speed (RPM) into the Slip Rate Calculator. The calculator will evaluate the Slip Rate.

## Slip Rate Formula

The following two example problems outline the steps and information needed to calculate the Slip Rate.

SR = (Ns - N) / Ns*100

Variables:

- SR is the Slip Rate (%)
- Ns is the synchronous speed (RPM)
- N is the rotational speed (RPM)

To calculate the slip rate, divide the difference between the synchronous speed and the rotational speed by the synchronous speed.

## How to Calculate Slip Rate?

The following steps outline how to calculate the Slip Rate.

- First, determine the synchronous speed (RPM).
- Next, determine the rotational speed (RPM).
- Next, gather the formula from above = SR = (Ns – N) / Ns*100.
- Finally, calculate the Slip Rate.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

synchronous speed (RPM) = 500

rotational speed (RPM) = 400

SR = (Ns – N) / Ns*100** **= ?