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Decibel-Milliwatts to Watts conversion

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

Enter the power in dBm press the Convert button:

How to convert dBm to Watts:

1 dBm = 0.0012589254118 W

The power conversion of dBm to Watts is given by the formula:

P(W) = 1W * 10P(dBm) / 10) / 1000 = 10((P(dBm) - 30)

Example:

Convert 43 dBm to watts:

P(W) = 1W * 10(43 dBm / 10) / 1000 = 19.9526 W

dBm to Watts conversion table

Power
(dBm)		 Power
(W)
-30 dBm 0.000001 W
-20 dBm 0.00001 W
-10 dBm 0.0001 W
0 dBm 0.001 W
1 dBm 0.0012589 W
2 dBm 0.0015849 W
3 dBm 0.0019953 W
4 dBm 0.0025119 W
5 dBm 0.0031628 W
6 dBm 0.0039811 W
7 dBm 0.0050119 W
8 dBm 0.0063096 W
9 dBm 0.0079433 W
10 dBm 0.01 W
20 dBm 0.1 W
30 dBm 1 W
40 dBm 10 W
50 dBm 100 W
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