Power and Energy
JtokWh
Convert joules (J) to kilowatt-hours (kWh).
Factor1 J = 2.777778e-7 kWh
Converter
J
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kWh
Rendered to 6 significant figures.
Formula
Formula
kWh = J × 2.777778e-7
Multiply any value in joules by 2.777778e-7 to obtain the value in kilowatt-hours.
Worked example
Convert 3.60000e+6 J to kWh.
- 01Start with 3.60000e+6 J.
- 02Multiply by the conversion factor: 3.60000e+6 × 2.777778e-7 = 1 kWh.
Result3.60000e+6 J = 1 kWh
Conversion table
| J | kWh |
|---|---|
| 1 | 2.7778e-7 |
| 2 | 5.5556e-7 |
| 5 | 1.3889e-6 |
| 10 | 2.7778e-6 |
| 20 | 5.5556e-6 |
| 50 | 1.3889e-5 |
| 100 | 2.7778e-5 |
| 200 | 5.5556e-5 |
| 500 | 0.00013889 |
| 1000 | 0.00027778 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from J to kWh?
1 J equals 2.777778e-7 kWh. To convert, multiply the value in joules by 2.777778e-7.
How do I convert 1 J to kWh?
1 J = 2.77778e-7 kWh. For any value, multiply by 2.777778e-7.
How do I convert kWh back to J?
Divide by the same factor — or equivalently, multiply by 3600000. So 1 kWh = 3.60000e+6 J.
When would I need to convert joule to kilowatt-hour?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
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).