Kilojoules to Kilowatt-hours
Snapshot
1 Kilojoule equals 0.000278 Kilowatt-hours. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.
- Reference basis: This conversion uses exact joule-based energy definitions.
- Example: For 5 Kilojoules, the result equals 0.001389 Kilowatt-hours.
- Use the reverse page if you need the opposite direction with the same basis.
Use the interactive calculator below for custom values and the common-value table for quick checks.
Interactive conversion
Converter Calculator
0.000278 Kilowatt-hours (kWh)
SwitchMachine access
Available to apps and AI agents
Kilojoules to Kilowatt-hours can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The identifiers below select the same calculation as the calculator.
Machine-readable identifiers
- Conversion family
energy- Source unit
kilojoules- Target unit
kilowatt_hours
The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.
Example API request and response
POST /api/v1/convertRequest
{
"family": "energy",
"value": 1,
"from": "kilojoules",
"to": "kilowatt_hours"
}Essential response
{
"ok": true,
"conversion": {
"family": "energy",
"value": 1,
"from": "kilojoules",
"to": "kilowatt_hours",
"result": {
"raw": 0.0002777777777777778,
"display": "0.000278"
},
"canonicalPath": "/energy/kilojoules-to-kilowatt-hours/"
}
}Explanation
Formula: Kilowatt-hours = Kilojoules × 0.000278. Why: watt-hour units convert to energy through the exact relationship 1 Wh = 3,600 J, so the calculator normalizes through joules before applying the target scale.
Kilojoules (kJ): an energy unit equal to 1,000 joules, common in science, engineering, and nutritional labeling.
Kilowatt-hours (kWh): an electrical energy unit equal to 3.6 million joules, widely used for utility billing, storage, and appliance consumption.
This route is useful when translating electrical energy values between joules, watt-hours, and kilowatt-hours for batteries, storage, and utility consumption comparisons.
This conversion is purely multiplicative because both units reduce through joules using fixed energy definitions with no offset.
Common Conversion Values
| Kilojoules (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 | 0.000278 |
| 5 | 0.001389 |
| 10 | 0.002778 |
| 100 | 0.027778 |
| 1,000 | 0.277778 |
| 3,600 | 1 |
| 10,000 | 2.777778 |
| 1,000,000 | 277.777778 |
Questions & answers
Frequently Asked Questions
What is 1 kilojoule in kilowatt-hours?
1 Kilojoule equals 0.000278 Kilowatt-hours on this page.
Does this Kilojoules to Kilowatt-hours page use the exact relationship 1 Wh = 3,600 J?
Yes. Watt-hour and kilowatt-hour routes use the exact relationship 1 Wh = 3,600 J through one joule normalization path, so electrical energy values stay aligned across the page.
When would I convert kilojoules to kilowatt-hours?
This route is useful when translating electrical energy values between joules, watt-hours, and kilowatt-hours for batteries, storage, and utility consumption comparisons.
How do I reverse Kilojoules to Kilowatt-hours?
Use the mirror Kilowatt-hours to Kilojoules route; it applies the inverse relationship with the same energy assumptions.