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dBm to Watts Converter - Online RF Power Unit Calculator

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dBm to Watts Converter

Online RF Power Unit Calculator – Convert dBm to Watts and vice versa instantly.

dBm
W
dBW: -
mW: -
kW: -
Formula: P(W) = 10(dBm-30)/10 , dBm = 10·log10(P(W)) + 30
Common dBm to Watts Reference Table
dBmPower (Watts)Power (mW)
Frequently Asked Questions

dBm (decibel-milliwatts) is a unit of power expressed in decibels relative to 1 milliwatt (mW). It is widely used in radio, microwave, and fiber-optic communication to conveniently express both very large and very small power values.

Use the formula: P(W) = 10(dBm - 30)/10. Simply enter the dBm value above, and the Watts equivalent will be calculated automatically.

dBm provides a logarithmic scale that makes it easier to handle the large dynamic range of power levels in RF systems. It simplifies calculations like link budgets and signal attenuation.

0 dBm equals exactly 1 milliwatt (mW), which is 0.001 Watts. It is the reference point for dBm.

dBW uses 1 Watt as the reference (0 dBW = 1 W), while dBm uses 1 milliwatt. The relationship is: dBW = dBm - 30.
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