Milliwatts to Decibel-Milliwatts conversion

Milliwatts (mW) to Decibel-Milliwatts (dBm) conversion calculator and how to convert.

Enter the power in milliwatts and press the Convert button:


How to convert Milliwatts to dBm

Megawatts to Watts conversion formula

The power in P(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) / 1 mW)

1 mW = 0 dBm


Example:

Convert 20 milliwatts to dBm:

P(dBm) = 10 * log10(20 mW / 1 mW) = 13.0103


Milliwatts to dBm conversion table

Power
(mW)
Power
(dBm)
0+ mW -∞ dBm
0.01 mW -20 dBm
0.1 mW -10 dBm
1 mW 0 dBm
2 mW 3.0103 dBm
3 mW 4.7712 dBm
4 mW 6.0206 dBm
5 mW 6.9897 dBm
6 mW 7.7815 dBm
7 mW 8.4510 dBm
8 mW 9.0309 dBm
9 mW 9.5424 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

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