Convert dBm to dBW to milli Watts to Watts.

Remember to press the ENTER key after you type in a value.

“dBm” notation represents a measured power level in decibels relative to 1mW. “dBW” notation represents a power level in decibels relative to 1 Watt.

“dB” notation is useful for representing gain or attenuation, where the output will always be related to the level of the input signal to a device. The input signal is either amplified or diminsihed by a certain factor, which is represented in decibels.

“dBm” and “dBW” notation is useful for representing a measured signal power level, such as the power level at the input to an amplifier.

Using dB notation simplifies power calculations in communications systems. For example, if the measured power at the input of an amplifier is 5dBm and the gain of the amplifier is 20dB, then the measured output power after the amplifier should be 5dBm + 20dB = 25dBm.

Found this calculator at http://www.bessernet.com/jobAids/dBmCalc/dBmCalc.html.