Root mean square of two values

How to use this calculator

1. Enter first value. Use the unit shown beside the field.
2. Enter second value. Use the unit shown beside the field.
3. Select Calculate and review the result. Select Reset to restore the example inputs.

How the calculation works

sqrt((First value*First value+Second value*Second value)/2)

Worked example

First value = 3; Second value = 4. Result: 3.53553.

Understand your result

Calculate the square root of the mean of two squared values. The result is expressed in the same currency or unit as the monetary inputs.

Assumptions and limitations

Equal weights are assumed. Results are rounded for display.

Questions about this tool