Conversion ... gain or attenuation in power to decibel (dBW).

Conversion from gain or attenuation in W to dB

It converts a power difference in equivalent gain or attenuation dB.

Data input

Initial power . . . . IN

W

Final power . . . OUT

W

Wait calculate

Results
Power ratio
Gain dB

Notes.
You can use any measure unit of power but it must be the same for the two inserted numbers.

Some reference levels :

Others :