The Root mean square (RMS) average of a set of values is the square root of the arithmetic mean of the squares of the values.

The formula for this is

**x _{RMS} = √(1/n)(x_{1}^{2} + x_{2}^{2} + … + x_{n}^{2})**

Use the calculator below to calculate the RMS average.

Enter the numbers **x _{1}, x_{2}, x_{3},** … each separated by a comma.

**Example Calculation**

The RMS average of two numbers **1** and **4** is **2.915**