Enter the power loss (watts) and the resistance (ohms) into the calculator to determine the AC Current.

- All Electrical Calculators
- AC to DC Voltage Calculator
- CT Ratio Calculator
- Air Conditioner Current Calculator
- DC Power Calculator
- Displacement Current Calculator

## AC Current Formula

The following formula is used to calculate the AC Current.

Iac = SQRT ( P/R)

- Where Iac is the AC Current (amps)
- P is the power loss (watts)
- R is the resistance (ohms)

To calculate AC current, divide the power loss by the resistance, then take the square root of the result.

## How to Calculate AC Current?

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

**Example Problem #1:**

- First, determine the power loss (watts). In this example, the power loss (watts) is measured to be 752.
- Next, determine the resistance (ohms). For this problem, the resistance (ohms) is calculated to be 50.
- Finally, calculate the AC Current using the formula above:

Iac = SQRT ( P/R)

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

Iac = SQRT ( 725/50) = 3.807 (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:

power loss (watts) = 895

resistance (ohms) = 40

Entering these values into the formula above gives :

Iac = SQRT ( 895/40) = 4.732(amps)