Enter the dBm, the impedance (ohms), and the resistance (ohms) into the calculator to determine the Current from dBm.

## Current from dBm Formula

The following formula is used to calculate the Current from dBm.

I = SQRT ( Z / 1000) * 10 ^ {(dBm / 20)} / R
• Where I is the Current from dBm (amps)
• Z is the dBm
• dBm is the impedance (ohms)
• R is the resistance (ohms)

## How to Calculate Current from dBm?

The following example problems outline how to calculate Current from dBm.

Example Problem #1

1. First, determine the dBm. In this example, the dBm is determined to be 14 .
2. Next, determine the impedance (ohms). For this problem, the impedance (ohms) is measured to be 5000 .
3. Next, determine the resistance (ohms). In this case, the resistance (ohms) is found to be 60.
4. Finally, calculate the Current from dBm using the formula above:

I = SQRT ( Z / 1000) * 10 ^ (dBm) / 20 / R

Inserting the values from above and solving yields:

I = SQRT ( 5000 / 1000) * 10 ^ (14 / 20) / 60 = .186 (amps)

Example Problem #2

Using the same method as above, determine the variables required by the formula. For this example problem, these are:

dBm = 42

impedance (ohms) = 10,000

resistance (ohms) = 5

Enter these given values into the calculator or above yields:

I = SQRT ( Z / 1000) * 10 ^ (dBm) / 20 / R = 79.621 (amps)