Joule to Kilowatt-hour
Free instant joule to kilowatt-hour converter. 1 J = 2.7778e-7 kWh.
Common Joule to Kilowatt-hour values
| Joule (J) | Kilowatt-hour (kWh) |
|---|---|
| 1 | 2.7778e-7 |
| 5 | 1.3889e-6 |
| 10 | 2.7778e-6 |
| 25 | 6.9444e-6 |
| 50 | 1.3889e-5 |
| 100 | 2.7778e-5 |
| 500 | 0.000138889 |
| 1000 | 0.000277778 |
How does Joule to Kilowatt-hour conversion work?
Type a value in the Joule (J) field and the equivalent in Kilowatt-hour (kWh) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Joule. The SI unit of energy. About the energy of a small apple falling from waist height.
Kilowatt-hour. The standard residential electricity unit. 1 kWh = running a 1,000-watt appliance for 1 hour.
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Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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