Enter the dBm, the impedance (ohms), and the resistance (ohms) into the calculator to determine the Current from dBm.
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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
- First, determine the dBm. In this example, the dBm is determined to be 14 .
- Next, determine the impedance (ohms). For this problem, the impedance (ohms) is measured to be 5000 .
- Next, determine the resistance (ohms). In this case, the resistance (ohms) is found to be 60.
- 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)
