dBm to Milliwatts Calculator

Try our new dBm/dBW/dBuV calculator - more conversions now available!

Input either a dBm value or milliwatts and hit 'enter' ('tab' if using Internet Explorer) to convert from one to the other.

The equation to get the dBm value from milliwatts is:

The equation to get milliwatts from a dBm value is:

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Submitted by rfrobenius on Wed, 09/13/2017 - 20:19

Try our new enhanced calculator with multiple conversions available.

Submitted by rfrobenius on Thu, 09/17/2015 - 15:07

I fixed an issue with the conversion from mW to dBm, caused by not all browsers supporting the JavaScript base-10 logarithm function yet.