Milliwatts to dBm free online conversion

mW to dBm conversion calculator

milliwatts (mW) to decibel-milliwatts (dBm), power conversion calculator.

Enter the power in mW and press the Convert button:

mW
dBmW

dBm to mW conversion »

How to convert mW to dBm

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,

1mW = 0dBm

Example

Convert 20mW to dBm:,

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

mW 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

dBm to mW conversion »


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