Watt to Kilowatt Converter
Convert Watt (W) to Kilowatt (kW) instantly. 1 W = 0.001 kW.
Power Converter
22 units available
1 W = 0.001 kW
Formula:
kW = W × 0.001With your value: 1 W = 0.001 kW
How big is that?
Everyday references on a logarithmic scale, all expressed in watt so you can sanity-check the result.
Other Watt to Kilowatt conversions
Watt to Kilowatt Conversion Table
| Watt (W) | Kilowatt (kW) |
|---|---|
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
Kilowatt to Watt Conversion Table
| Kilowatt (kW) | Watt (W) |
|---|---|
| 0.5 | 500 |
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1000 | 1,000,000 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Watt (W)
Power
Derived from the watt (1 W = 1 J/s).
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Kilowatt (kW)
Power
Derived from the watt (1 W = 1 J/s).
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Watt to Kilowatt
To convert from Watt (W) to Kilowatt (kW), multiply the value by 0.001.
Formula: kW = W × 0.001
Reverse: W = kW × 1,000
Step-by-Step Example
- Start with your value in Watt. For example: 5 W
- Multiply by the conversion factor: 5 x 0.001
- The result is: 0.005 kW
About Watt
The watt (W) is a unit of power. One watt equals 1 watt. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: power calculations, engineering and science, education.
About Kilowatt
The kilowatt (kW) is a unit of power. One kilowatt equals 1000 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: power calculations, engineering and science, education.
Frequently Asked Questions
How many Kilowatt are in 1 Watt?
There are exactly 0.001 Kilowatt in 1 Watt. This means the conversion factor from Watt to Kilowatt is 0.001.
What is the formula to convert Watt to Kilowatt?
The formula to convert Watt to Kilowatt is: kW = W × 0.001. For example, to convert 10 Watt to Kilowatt, you would multiply 10 by 0.001.
What is a Watt?
The watt (W) is a unit of power. One watt equals 1 watt. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Kilowatt?
The kilowatt (kW) is a unit of power. One kilowatt equals 1000 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What are the common uses of Watt?
The Watt is commonly used in power calculations, engineering and science, education.
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Cite this page
UnitConvertLab. (2026). Watt to Kilowatt converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/watt-to-kilowatt