Kilowatts (kW) to Decibel-milliwatts (dBm) Conversion

Kilowatts

The kilowatt (kW) is a unit of power equal to exactly 1,000 watts and is the practical unit for household appliances, vehicle engines, and small industrial machinery. Electric kettles typically consume 2–3 kW; domestic air conditioners run at 1–5 kW; EV charging stations provide 7–22 kW for home use. Engine power in electric vehicles is specified in kilowatts globally, replacing the horsepower in official EU vehicle type approval documentation.

Decibel-milliwatts

The decibel-milliwatt (dBm) is a unit of power expressed on a logarithmic scale relative to one milliwatt (1 mW). It is defined as dBm = 10 × log₁₀(P / 1 mW), where P is power in milliwatts. Used universally in RF engineering, telecommunications, and audio systems: Wi-Fi signal strength is expressed in dBm (typical values −30 to −90 dBm); a 0 dBm signal equals 1 mW; 30 dBm equals 1 W; −10 dBm equals 0.1 mW. Note: dBm cannot be converted with a simple multiplier — it requires the logarithmic formula.