Enter the average power (watts) and the RMS voltage into the calculator to determine the RMS Current.

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## RMS Current Formula

The following formula is used to calculate the RMS Current.

**Irms = Pave / Vrms**

- Where Irms is the RMS Current (amps)
- Pave is the average power (watts)
- Vrms is the RMS voltage (volts)

## How to Calculate RMS Current?

The following two example problems outline how to calculate the RMS Current.

**Example Problem #1:**

- First, determine the average power (watts). In this example, the average power (watts) is measured to be 120.
- Next, determine the RMS voltage. For this problem, the RMS voltage is calculated to be 6 volts.
- Finally, calculate the RMS Current using the formula above:

Irms = Pave / Vrms

Inserting the values from above and solving the equation with the imputed values gives:

Irms = 120 / 6 = 20 (amps)

**Example Problem #2: **

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

average power (watts) = 270

RMS voltage = 3 volts

Entering these values into the formula above gives :

Irms = 270 / 3 = 90 (amps)