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Common RF
Unit Conversion
dBm ⇄ Watt Power Converter
Professional RF power conversion calculator with instant bidirectional conversion.
Logarithmic Input
dBm
Base PhysicsP(W) = 10^(dBm / 10) / 1000
Linear Input
W
Logarithmic MapP(dBm) = 10 × log₁₀(P(W) × 1000)
RF Power Scale Reference
dBmWatts / mWOperational Context
-40 dBm
1e-7 W0.0001 mW
Weak signal threshold-30 dBm
0.000001 W0.001 mW
Typical UE max power-20 dBm
0.00001 W0.01 mW
Very low power-10 dBm
0.0001 W0.1 mW
IoT devices0 dBm
0.001 W1 mW
Reference: 1 milliwatt10 dBm
0.01 W10 mW
WiFi router20 dBm
0.1 W100 mW
Mobile phone / Small cell30 dBm
1 W1000 mW
1 watt (reference)40 dBm
10 W10000 mW
Base station / Macro cell46 dBm
39.8 W39811 mW
Max LTE power50 dBm
100 W100000 mW
High power transmitterPhysics Directive
Decibel-milliwatts (dBm) is an absolute unit of power level. Every 3 dB increase represents a doubling of linear power, while every 10 dB represents a ten-fold increase.
Conversion History
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