Kilojoule to Watt-hour Converter
無料エネルギー換算ツール, ジュール、カロリー、キロワット時、BTUを瞬時に換算
1Kilojoule=0.2777777778Watt-hour
1 Watt-hour = 3.6 Kilojoule
Kilojoule
- Symbol
- kJ
- System
- Metric/Imperial
- Dimension
- Various
Watt-hour
- Symbol
- Wh
- System
- Metric/Imperial
- Dimension
- Various
Quick Reference Table
| Kilojoule | Watt-hour | Watt-hour | Kilojoule |
|---|---|---|---|
| 1 | 0.2777777778 | 1 | 3.6 |
| 2 | 0.5555555556 | 2 | 7.2 |
| 3 | 0.8333333333 | 3 | 10.8 |
| 5 | 1.3888888889 | 5 | 18 |
| 10 | 2.7777777778 | 10 | 36 |
| 25 | 6.9444444444 | 25 | 90 |
| 50 | 13.8888888889 | 50 | 180 |
| 100 | 27.7777777778 | 100 | 360 |
| 500 | 138.8888888889 | 500 | 1800 |
| 1000 | 277.7777777778 | 1000 | 3600 |
Conversion Formula
Watt-hour = Kilojoule × 0.2777777778
Kilojoule = Watt-hour × 3.6
Factors are from BIPM SI brochure and NIST SP 811, stored unrounded and computed via a base unit. Reverse factor is 1 ÷ 0.2777777778.
How to convert Kilojoule to Watt-hour
Multiply the value in kilojoule by 0.2777777778 to get watt-hour. For example, 5 Kilojoule = 1.3888888889 Watt-hour. All results in the エネルギー converter update instantly as you type, so you can see every unit at once without manual math.
Common mistakes
Do not round the factor to 0.27 too early — keep full precision until the final display. For エネルギー, always verify critical calculations (medicine, engineering) with a second source.
FAQ
- How many Watt-hour in 1 Kilojoule?
- 1 Kilojoule = 0.2777777778 Watt-hour.
- How many Kilojoule in 1 Watt-hour?
- 1 Watt-hour = 3.6 Kilojoule.
- What is the source?
- BIPM/NIST via OmniConverter base-unit engine. Source table and formula above are exact.
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