dBm, mW, Watt and dB Converter

Convert power between dBm, milliwatts, and watts, and convert a dB gain or loss to a linear ratio and back. All fields update each other live.

What this tool does

Radio power is written two ways: dBm (a compressed scale that keeps the numbers small) and watts or milliwatts (the actual power). This converter moves between them instantly. It also turns a gain or loss in dB into a plain "times" factor. Type into any box and the others update.

Power: dBm, milliwatts and watts

dBm

Milliwatts (mW)

Watts (W)

Gain or loss: dB and a plain multiplier

dB (gain is positive, loss is negative)

As a plain multiplier (times factor)

For example, 3 dB is about 2 times the power, 10 dB is 10 times

Common ISP RF power levels

Reference	dBm	Power
MikroTik default TX	20-23 dBm	100-200 mW
Cambium PTP typical	23 dBm	200 mW
Ubiquiti AirMax typical	27 dBm	500 mW
EIRP limit 5 GHz Pakistan	Check current Frequency Allocation Board (FAB) limits

RF Power

Designing a wireless link?

Use our Link Budget Calculator to turn these power figures into a full path calculation, or have Network Design and Optimization review your wireless design.

Link Budget Calculator Network Design