dBm / Watt Converter
Convert between dBm and milliwatts/watts for RF power measurements
dBm → WattWatt → dBm
P(mW) = 10^(dBm / 10)
dBm = 10 × log₁₀(P(mW))
Enter Value
Conversion Result
dBm
0.00 dBm
Power
1.000 mW
pW
1.000e+9
nW
1.000e+6
µW
1000
mW
1.000
W
0.001000
kW
1.000e-6
Common dBm Values Reference
| dBm | Power | Application |
|---|---|---|
| -30 dBm | 1.000 µW | Very low power |
| -20 dBm | 10.000 µW | Low power |
| -10 dBm | 100.000 µW | Low power |
| 0 dBm | 1.000 mW | Reference (1 mW) |
| 3 dBm | 1.995 mW | Double power |
| 7 dBm | 5.012 mW | Bluetooth Class 2 |
| 10 dBm | 10.000 mW | 10 mW |
| 13 dBm | 19.953 mW | Wi-Fi typical |
| 17 dBm | 50.119 mW | Wi-Fi 802.11n |
| 20 dBm | 100.000 mW | 100 mW / Bluetooth Class 1 |
| 23 dBm | 199.526 mW | Wi-Fi max (200 mW) |
| 27 dBm | 501.187 mW | 0.5 W mobile phone |
| 30 dBm | 1.000 W | 1 W |
| 33 dBm | 1.995 W | 2 W cell tower |
| 36 dBm | 3.981 W | 4 W |
| 37 dBm | 5.012 W | 5 W Ham radio |
| 40 dBm | 10.000 W | 10 W |
| 43 dBm | 19.953 W | 20 W |
| 47 dBm | 50.119 W | 50 W FM transmitter |
| 50 dBm | 100.000 W | 100 W |
| 60 dBm | 1.000 kW | 1 kW broadcast |