| dBm = log10 (mW)*10 mW =10^(dBm/10 | |||
| 40 dBm | 10.00 watts | ||
| 36 dBm | 4.00 watts | < Maximum ERP allowed by FCC in U.S. | |
| 30 dBm | 1.00 watts | ||
| 27 dBm | 500 milliwatts | ||
| 26 dBm | 400 milliwatts | ||
| 25 dBm | 320 milliwatts | ||
| 24 dBm | 250 milliwatts | ||
| 23 dBm | 200 milliwatts | ||
| 22 dBm | 160 milliwatts | ||
| 21 dBm | 130 milliwatts | ||
| 20 dBm | 100 milliwatts | < Maximum ERP allowed by E.T.S.I. In Europe | |
| 15 dBm | 32 milliwatts | ||
| 10 dBm | 10 milliwatts | ||
| 5 dBm | 3.2 milliwatts | ||
| 4 dBm | 2.5 milliwatts | ||
| 3 dBm | 2.0 milliwatts | ||
| 2 dBm | 1.6 milliwatts | ||
| 1 dBm | 1.3 milliwatts | ||
| 0 dBm | 1.0 milliwatts | ||
| 1- dBm | 0.79 milliwatts | ||
| 5- dBm | 0.32 milliwatts | ||
| 10- dBm | 0.1 milliwatts | ||
| 20- dBm | 0.01 milliwatts | ||
| 30- dBm | 0.001 milliwatts | ||
| 40- dBm | 0.0001 milliwatts | ||
| 50- dBm | 0.00001 milliwatts | ||
| 60- dBm | 0.000001 milliwatts | ||
| 70- dBm | 0.0000001 milliwatts | ||
| 80- dBm | 0.00000001 milliwatts | < Receive threshold for most WLAN devices | |