dBm to Watts Calculator

Convert dBm power level to watts.

Power (W) 1

Power (mW) 1,000

Formula: W = 10^((dBm − 30) ÷ 10)

Step-by-step with your numbers:

1. Values used:

2. Power = 30 dBm

4. Power = 1W

5. Power = 1,000mW

Did we solve your problem today?

Convert a logarithmic dBm power level to watts.

The math behind it

watts = 10^((dBm − 30) ÷ 10); milliwatts = 10^(dBm ÷ 10).

30 dBm = 1 W (1000 mW).

0 dBm?

Exactly 1 milliwatt.