Watts To dBm Converter
Conversion Table
| Watts | dBm |
|---|---|
| 0.000001 W | -30 dBm |
| 0.00001 W | -20 dBm |
| 0.0001 W | -10 dBm |
| 0.001 W | 0 dBm |
| 0.01 W | 10 dBm |
| 0.1 W | 20 dBm |
| 1 W | 30 dBm |
| 10 W | 40 dBm |
| 100 W | 50 dBm |
Reverse Conversion
How This Converter Works
Convert power from watts (W) to decibel-milliwatts (dBm), using 1 milliwatt as the reference power. The page uses the formula dBm = (10 times log10(x) + 30) dBm.
Formula or rule
dBm = (10 times log10(x) + 30) dBm
Example
- Input
- 0.001 Watts
- Calculation
- (10 times log10(0.001) + 30) = 0
- Result
- 0 dBm