The watts to dBm conversion calculator is a simple tool that allows you to convert power values in watts to dBm units. To use the calculator, simply enter the power value in watts into the input field and click “Convert“. The result will be displayed in the output field in dBm units. You can also use the “Reset” button to clear the input and output fields and start over.
Watts to dBm Conversion Calculator
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How to Convert Watts to dBm?
In the realm of electrical engineering, power is measured in watts (W) and decibel-milliwatts (dBm), both of which are crucial units in determining the strength of a signal. The conversion formula between these units is fundamental knowledge for any engineer or technician working with electronics.
To convert power from watts to dBm, the formula P(dBm) = 10 * log10( 1000 * P(W) / 1W) = 10 * log10( P(W) / 1W) + 30 is used. Here, P (W) represents the power in watts, while P (dBm) denotes the power in dBm. The formula is derived from the fact that 1 milliwatt (mW) is equal to 0 dBm. So
1 W = 30 dBm.
In simpler terms, to calculate the power in dBm, the power in watts is multiplied by 1000, then the logarithm base 10 is taken, and the result is multiplied by 10. Finally, adding 30 to the result provides the power in dBm.
Example
Let’s say you have a Wi-Fi router that has a maximum output power of 0,1 W. You want to know the power level in decibel-milliwatts (dBm), which is a commonly used unit of measurement for signal strength in telecommunications.
To convert watts to dBm, you can use the following formula:
P(dBm) = 10 * log10( 1000 ⋅ P(W) / 1W)
where power (W) is the power in watts.
Using this formula, we can calculate the power level in dBm for our Wi-Fi router:
Power (dBm) = 10 * log10(1000 * 0.1) = 20 dBm
So the power level of our Wi-Fi router is 20 dBm, which is a measure of the power ratio in decibels (dB) relative to 1 milliwatt (mW).
Watt to dBm Conversion Table
| Power (W) | Power (dBm) |
|---|---|
| 0 W | not defined |
| 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 |
| 1000 W | 60 dBm |
| 10000 W | 70 dBm |
| 100000 W | 80 dBm |
| 1000000 W | 90 dBm |
