# RMS Voltage (VRMS) Calculator

Enter the peak voltage into the calculate to determine the root means square of a sinusoidal voltage.

## VRMS Formula

The following formula can be used to calculate the root mean square voltage of a sinusoidal periodic voltage.

VRMS = Vpeak * .7071

• Where VRMS is the root mean square voltage
• Vpeak is the peak voltage

## FAQ

What is VRMS?

VRMS stands for root mean square voltage. It’s a measure of the the peak voltage of a sinusoidal periodic voltage source times 1/sqrt(2) (aka root mean). It’s often described as the amount of AC power required to produce the same heat effect of DC power at the peak voltage.

## How to calculate VRMS?

How to calculate VRMS?

1. First, determine the peak voltage.

Measure or calculate the peak voltage of the sinusoidal voltage source.

2. Next, enter the value into the formula.

Enter the value of the peak voltage into the formula and multiply it by .7071.

3. Analyze the results.

Compare the results of the VRMS calculate in step 2 with the expected outcome.