Decibel watt

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The Decibel watt or dBW is a unit for the measurement of the strength of a signal expressed in decibels relative to one watt. It is used because of its capability to express both very large and very small values of power in a short range of number, eg 10 watts = 10 dBW, and 1,000,000 W = 60 dBW.

dBW = 10 \log_{10}(P / (1 \ \mathrm{W}))

where P is an arbitrary power.

See dBm for details.

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