0.1 Watt (100 mW) to dBm
0.1 watts (100 mW) equals exactly 20 dBm.
How to use this tool
- Enter power in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your power and the full breakdown beneath it.
100 mW is the typical maximum output of Wi-Fi devices; converting to 20 dBm is essential for link budget calculations.
Frequently asked questions
- How much power does a phone transmit?
- A typical smartphone transmits at 0–23 dBm (1 mW to 200 mW) depending on the distance to the cell tower and the band used.
- Why use dBm instead of watts?
- dBm compresses a huge range (picowatts to kilowatts) into a manageable scale and makes gain/loss calculations simple additions and subtractions.