How to convert watts to kilowatts
To convert a measurement in watts to kilowatts, multiply the value by 0.001. The conversion factor comes from the relationship between both units and the watt.
For example, to convert 5 W to kilowatts: 5 × 0.001 = 0.005 kW.
What is a watt?
A watt is the SI derived unit of power, equal to one joule of energy per second (1 J/s). Named after Scottish engineer James Watt, whose steam-engine improvements powered the Industrial Revolution. The watt became the SI unit of power in 1960 and now measures everything from light bulbs to power plants.
Common uses of watts include: Light bulb and appliance ratings; Electronic device power consumption; Audio amplifier output; Scientific and electrical calculations.
What is a kilowatt?
A kilowatt equals 1,000 watts and is the standard unit for the power of motors, heaters, and electric vehicles. As electrical machinery grew more powerful, the kilowatt became the practical unit for rating engines and appliances, and it is now the metric counterpart to horsepower in automotive specifications.
Common uses of kilowatts include: Electric vehicle motor power; Home appliance and heater ratings; Car engine output (metric); Solar array and generator capacity.
Watts to kilowatts worked examples
Here are some common values converted:
1 W = 0.001 kW 5 W = 0.005 kW 10 W = 0.01 kW 50 W = 0.05 kW 100 W = 0.1 kW
Frequently asked questions
How many kilowatts are in one watt?
One watt (W) equals 0.001 kilowatts (kW). Multiply any value in watts by 0.001 to convert to kilowatts.
How do I convert watts to kilowatts?
Multiply the value in watts by 0.001. For example, 5 W × 0.001 = 0.005 kW.
How do I convert kilowatts to watts?
Multiply the value in kilowatts by 1,000, or divide by 0.001. Use the swap button on the converter above to reverse the direction.
Is the watt to kilowatt conversion exact?
Mechanical horsepower is defined as exactly 745.7 W and metric horsepower as 735.49875 W. SI conversions are exact.
What is the formula for watts to kilowatts?
The formula is: kW = W × 0.001. This comes from the definition of both units relative to the watt.