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Common RF

Unit Conversion

dBm ⇄ Watt Power Converter

Professional RF power conversion calculator with instant bidirectional conversion.

Logarithmic Input

Power Magnitude (dBm)

dBm

Standard dBm Presets

Base PhysicsP(W) = 10^(dBm / 10) / 1000

Linear Input

Power Magnitude (Watts)

Standard Linear Presets

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 devices

0 dBm

0.001 W1 mW

Reference: 1 milliwatt

10 dBm

0.01 W10 mW

WiFi router

20 dBm

0.1 W100 mW

Mobile phone / Small cell

30 dBm

1 W1000 mW

1 watt (reference)

40 dBm

10 W10000 mW

Base station / Macro cell

46 dBm

39.8 W39811 mW

Max LTE power

50 dBm

100 W100000 mW

High power transmitter

Physics 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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