Enter the true voltage (amps) and the true resistance (ohms) into the calculator to determine the True Power.

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## True Power Formula

The following formula is used to calculate the True Power.

Pt = E^2/ R

- Where Pt is the True Power (watts)
- E is the true voltage (amps)
- R is the true resistance (ohms)

To calculate the true power, square the true voltage, then divide by the true resistance.

## How to Calculate True Power?

The following two example problems outline how to calculate the True Power.

**Example Problem #1:**

- First, determine the true voltage (amps). In this example, the true voltage (amps) is measured to be 43.
- Next, determine the true resistance (ohms). For this problem, the true resistance (ohms) is calculated to be 85.
- Finally, calculate the True Power using the formula above:

Pt = E^2/ R

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

Pt = 43^2/ 85 = 21.75 (watts)

**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:

true voltage (amps) = 58

true resistance (ohms) = 60

Entering these values into the formula or calculator above gives us:: Pt = 58^2/ 60 = 56.06 (watts)