Tue - 22 Jan 2019                            



mW to dBm Calculator

dBm Definition

dBm is defined as power ratio in decibel (dB) referenced to one milliwatt (mW). It is an abbreviation for dB with respect to 1 mW and the "m" in dBm stands for milliwatt.

dBm is different from dB. dBm represents absolute power, whereas dB is a ratio of two values and is used to represent gain or attenuation. For example, 3 dBm means 2 mW, and 3 dB means a gain of 2.Similarly, -3 dBm means 0.5 mW, whereas -3 dB means attenuation of 2.

The formula to calculate dBm from mW is:

mW Definition

Enter value to convert from mW to dBm below.

Enter mW =

dBm =(Value Rounded to 4 digits after decimal)

dBm to mW Calculator

milli-Watt to dBm Table

dBm to milli-Watt Table