任意功率P(mW)與xdBm換算的公式如下：
| dBm | mW | dBm |
W |
| 0 | 1.0mW | 30 | 1000mW=1W |
| 1 | 1.3mW | 31 | 1.3W |
| 2 |
1.6m W |
32 | 1.6 W |
| 3 | 2.0mW | 33 | 2.0W |
| 4 | 2.5mW | 34 | 2.5W |
| 5 | 3.2mW | 35 | 3.2W |
| 6 | 4.0mW | 36 | 4.0W |
| 7 | 5.0mW | 37 | 5.0W |
| 8 | 6.0mW | 38 | 6.0W |
| 9 | 8mW | 39 | 8.0W |
| 10 | 10mW | 40 | 10W |
| 11 | 13mW | 41 | 13W |
| 12 | 16mW | 42 | 16W |
| 13 | 20mW | 43 | 20W |
| 14 | 25mW | 44 | 25W |
| 15 | 32mW | 45 | 32W |
| 16 | 40mW | 46 | 40W |
| 17 | 50mW | 47 |
50 W |
| 18 | 64mW | 48 | 64W |
| 19 | 80mW | 49 | 80W |
| 20 | 100mW | 50 | 100W |
| 21 | 128mW | 51 | 128W |
| 22 | 160mW | 52 | 160W |
| 23 | 200mW | 53 | 200W |
| 24 | 250mW | 54 | 250W |
| 25 | 320mW | 55 | 320W |
| 26 | 400mW | 56 | 400W |
| 27 | 500mW | 57 | 500W |
| 28 | 640mW | 58 | 640W |
| 29 | 800mW | 59 | 800W |
| 30 | 1000mW=1W | 60 | 1000W |