milliwatt to Decibel-W Conversion
Milliwatt to dBm power converter

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