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dBm to Watts Calculator

What is dBm to Watts Converter?

A dBm to Watts converter is a very useful tool in converting any power measurement that exists in dBm, or decibel-milliwatts, to watts. This conversion is very familiar in the fields of telecommunications, electronics, and audio engineering since it allows a precise measurement of signal strength and power output. In simple words, dBm is a logarithmic quantity that means power relative to 1 milliwatt, whereas watts is the unit that measures energy per unit time.

you can also calculate watts from dBm using the dBm to watts formula given below: P(W) = 1W â‹… 10(P(dBm) / 10) / 1000 = 10((P(dBm)– 30) / 10)

dBm to Watts Conversion

Formula: Convert dBm to Watts

To convert a power level from dBm to watts:

\[ P_{\text{W}} = 10^{\left(\frac{P_{\text{dBm}} - 30}{10}\right)} \]

Where:

  • \(P_{\text{W}}\) = Power in watts
  • \(P_{\text{dBm}}\) = Power in dBm

Example Calculation

If the power is 20 dBm:

\[ P_{\text{W}} = 10^{\left(\frac{20 - 30}{10}\right)} = 0.1 \text{ watts} \]

dBm to Watts Chart

dBm to Watts Chart

dBm Watts
-30 dBm 0.000001 W
-20 dBm 0.00001 W
-10 dBm 0.0001 W
0 dBm 0.001 W
10 dBm 0.01 W
20 dBm 0.1 W
30 dBm 1 W
40 dBm 10 W
50 dBm 100 W

How to use dBm to Watts Calculator?

  • Enter the power in dBm.
  • Click “Convert.”
  • View the result in Watts.
  • Repeat for more conversions if needed.
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