Enter the peak voltage into the calculator 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 = V_{peak} * .7071

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

## VRMS Definition

VRMS stands for root mean square voltage and it is a measure of the average voltage of the root mean of a sine wave voltage.

## How to calculate VRMS?

How to calculate VRMS?

**First, determine the peak voltage.**Measure or calculate the peak voltage of the sinusoidal voltage source.

**Next, enter the value into the formula.**Enter the value of the peak voltage into the formula and multiply it by .7071.

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

## FAQ

**What is VRMS?**

VRMS stands for root mean square voltage. It’s a measure of 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 as DC power at the peak voltage.