mW to dBm Conversion Milliwatt to dBm power converter

Decibel conversion of electric power units. mW to dBm (dB-milliwatt) and/or dBW (dB-Watt). Here is the answer to the question: What is 3.3 mW in dBm or 3.3 mW to Decibel-Watts. Use the calculator below to convert any mW values to dBm or dBW.

mW to dBm / W to dBW Power Converter

 Milliwatt (mW) Watt (W) dBm (dB-mW) dBW (dB-W) or = = Answer appears here

Watt (W), milliwatt (mW) Conversion Table

Power (mW) Power (dBm)
0.01 mW -20.0000 dBm
0.1 mW -10.0000 dBm
1 mW 0.0000 dBm
2 mW 3 dBm
3 mW 4.8 dBm
4 mW 6 dBm
5 mW 7 dBm
6 mW 7.8 dBm
7 mW 8.5 dBm
8 mW 9 dBm
9 mW 9.5 dBm
10 mW 10 dBm
100 mW 20 dBm
1000 mW 30 dBm
10000 mW 40 dBm
100000 mW 50 dBm
1000000 mW 60 dBm
10000000 mW 70 dBm
100000000 mW 80 dBm
1000000000 mW 90 dBm
10000000000 mW 100 dBm

mW to dBm Conversion

dBm Definition: dBm is the power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW).

The formula bellow can be translated as: "the power P(dBm) in dBm is equal to 10 times the base 10 logarithm of the power P(mW) in milliwatts (mW) divided by 1 milliwatt (mW)":

P(dBm) = 10 · log10(P(mW)/1mW)

So, for P = 1 mW is equal to 0 dBm

Example:

Convert 100 mW to dBm:

P(dBm) = 10 · log10(100mW / 1mW) = 20 dBm

W to dBW Conversion

The decibel-watt or dBW isthe power ratio in decibels (dB) of the measured power referenced to one Watt (W).:

P(dBW) = 10 · log10(P(W)/1W)

Example:

Convert 10 W to dBW:

P(dBW) = 10 · log10(10W / 1W) = 10 dBW