mW to dBm conversion

mW to dBm Converter

dBm result: dBm

mW to dBm Conversion

It is a conversion calculator that is used to convert the power in milliwatts (mW) to decibel-milliwatts (dBm). It uses a simple formula and programmed controls when executing the conversions. First, use the blank text field to enter the value in milliwatts. Click the ‘Convert' button to initiate the conversion from milliwatts to decibel-milliwatts.

The results in decibel-milliwatts will be displayed below the two controls at the bottom panel of the calculator. Use the ‘Reset' button if you want to perform new conversions from milliwatts to decibel-milliwatts. This calculator gives accurate results depending on the values entered in the blank text field.

For example;

Convert 100 to milliwatts to decibel-milliwatts.


The first step is to enter the value in milliwatts (mW) in the blank text field. Click the ‘Convert' button to get the results in decibel-milliwatts. It will be shown as; 20 dBm.

The same procedure can be used when you have new values in milliwatts. The efficiency of this calculator is enhanced by the ‘Reset' button. It is used to erase all data of previous calculations from the calculator.

Formula for converting milliwatts to dBm

P (dBm) = 10 x log 10 (P (mW) / 1mW)


1mW = 0dBm.

Where, the power in decibel-milliwatts is equivalent to 10 multiplied by the base 10 logarithms of the power in milliwatts and then divided by 1 milliwatt.

Using the example above;

Convert 100 milliwatts to decibel-milliwatts,

The calculation will be;

P (dBm) = 10 x log 10 (100mW / 1mW)

= 20 dBm

The milliwatts to dBm conversion table can also be used to determine the conversion of common values from milliwatts to decibel-milliwatts based on a scale of 0+ mW to 10000000000 mW

Note that this calculator can only convert values from milliwatts to decibel-milliwatts. If your values are in decibel-milliwatts, we recommend using the dBm to mW converter.