Power and Energy
J/stokW
Convert joules per second (J/s) to kilowatts (kW).
Factor1 J/s = 0.001 kW
Converter
J/s
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kW
Rendered to 6 significant figures.
Formula
Formula
kW = J/s × 0.001
Multiply any value in joules per second by 0.001 to obtain the value in kilowatts.
Worked example
Convert 10000 J/s to kW.
- 01Start with 10000 J/s.
- 02Multiply by the conversion factor: 10000 × 0.001 = 10 kW.
Result10000 J/s = 10 kW
Conversion table
| J/s | kW |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from J/s to kW?
1 J/s equals 0.001 kW. To convert, multiply the value in joules per second by 0.001.
How do I convert 1 J/s to kW?
1 J/s = 0.001 kW. For any value, multiply by 0.001.
How do I convert kW back to J/s?
Divide by the same factor — or equivalently, multiply by 1000. So 1 kW = 1000 J/s.
When would I need to convert joule per second to kilowatt?
Power conversions are common when comparing motor ratings (often kW or hp), thermal duty (BTU/hr or kW), and utility consumption in mixed-unit projects.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).