The transmit power of a node can be represented in a logarithmic (dBm) or linear (watts) format, but they represent the same thing.
Online Calculator
Conversion Table
| dBm | watts |
|---|---|
| 20 | 0.1 |
| 21 | 0.125 |
| 22 | 0.158 |
| 23 | 0.199 |
| 24 | 0.251 |
| 25 | 0.316 |
| 26 | 0.398 |
| 27 | 0.501 |
| 28 | 0.631 |
| 29 | 0.794 |
| 30 | 1.0 |