ConvertOnlineWatts to Decibel-milliwatts calculator
Enter a number to see the converted value immediately.
Watts to Decibel-milliwatts formula
Use this formula to convert watts to decibel-milliwatts:
Calculation
Enter a valid number above to see the formula with your value substituted step by step.
Watts to Decibel-milliwatts Conversion Table
Reference values for converting Watts to Decibel-milliwatts.
| Watts (W) | Decibel-milliwatts (dBm) |
|---|---|
| 0.1 W | 20 dBm |
| 1 W | 30 dBm |
| 2 W | 33.0103 dBm |
| 5 W | 36.9897 dBm |
| 10 W | 40 dBm |
| 20 W | 43.0103 dBm |
| 50 W | 46.9897 dBm |
| 100 W | 50 dBm |
Worked example
Convert 15 Watts to Decibel-milliwatts
Decibel-milliwatts = 10 × Math.log(15 × 1000) × Math.LOG10E = 41.7609 Decibel-milliwatts
About these units
Watts
The watt (W) is the SI unit of power, defined as one joule per second. It is used to measure the rate of energy transfer and is commonly used in a wide range of applications, including electricity, mechanics, and heating.
Decibel-milliwatts
A decibel milliwatt (dBm) is a unit of power level used in radio, microwave, and fiber-optic communication networks. It is a logarithmic unit that expresses power relative to one milliwatt.
{"formula":"10*Math.log(x*1000)*Math.LOG10E","precision":11,"x_desc":"Watts","y_desc":"Decibel-milliwatts"}