The watt (W) is the SI unit of power, equal to one joule of energy transferred per second.
Watts to Kilowatts
Convert Watt (W) to Kilowatt (kW) instantly with an exact formula, conversion table, and FAQ.
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Convert watts (W) to kilowatts (kW) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilowatt (kW) equals 1,000 watts and is the typical scale for household appliances and small motors.
kW = W × 0.001
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Formula
kW = W × 0.001
W = kW × 1000
Conversion table
| 1 W | 0.001 kW |
| 5 W | 0.005 kW |
| 10 W | 0.01 kW |
| 20 W | 0.02 kW |
| 50 W | 0.05 kW |
| 100 W | 0.1 kW |
| 500 W | 0.5 kW |
| 1000 W | 1 kW |
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How the formula works
Both watt and kilowatt measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in watts by 0.001 to get kilowatts. To reverse the conversion, multiply a kilowatt value by 1000 to get back to watts.
Frequently asked questions
What is Watt (W)?
The watt (W) is the SI unit of power, equal to one joule of energy transferred per second.
What is Kilowatt (kW)?
A kilowatt (kW) equals 1,000 watts and is the typical scale for household appliances and small motors.
How do I convert watts to kilowatts?
Multiply the watt value by 0.001 to get the equivalent in kilowatts. For example, 5 W × 0.001 = 0.005 kW.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.001 is an exact, non-rounded value.
Can I convert kilowatts back to watts?
Yes. Divide the kilowatt value by 0.001, or multiply it by 1000, to get watts.
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About converting watts to kilowatts
The watt (W) is the SI unit of power, equal to one joule of energy transferred per second. A kilowatt (kW) equals 1,000 watts and is the typical scale for household appliances and small motors.
Use this calculator to move between watts and kilowatts accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.