RF Power Conversion Calculator
Enter the known values and run the calculation.
Enter the known power value, choose its unit, and run the conversion.
The result lists the equivalent values in the other supported units so you can move directly into the next calculation.
Overview
Convert RF power between watts, milliwatts, dBm, and dBW in one place.
Use this tool to convert RF power between milliwatts, watts, dBm, and dBW without doing the logarithmic conversion by hand.
Use it for link-budget work, analyzer interpretation, and quick checks when one source uses linear power and another uses logarithmic units.
The math and how it's used
The calculation normalizes the input into watts, then converts to the other supported linear and logarithmic units.
dBm references 1 mW and dBW references 1 W.
This is the quick unit-translation tool for RF work when one instrument reports watts, another reports dBm, and the link-budget math has to stay consistent.
It only converts power units. If you start from voltage or current, the impedance relationship has to be known first or the converted power number is meaningless.
What to watch
This tool converts power only. If you start from voltage or current, the impedance relationship has to be known before the result means anything in watts or dBm.
For linear power inputs, zero and negative values are not valid because the logarithmic conversions are undefined there.