Convert kilojoule to watt-hour
Please provide values below to convert kilojoule [kJ] to watt-hour [W*h], or Convert watt-hour to kilojoule.
1 kJ = 0.277777777778 W*h. To convert kilojoule to watt-hour, multiply the value by 0.277777777778; to go the other way, divide by it (1 W*h = 3.6 kJ). Both units measure energy and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 kJ = 0.277777777778 W*h
- 1 W*h = 3.6 kJ
- 10 kJ = 2.77777777778 W*h
- 100 kJ = 27.7777777778 W*h
How to Convert Kilojoule to Watt-Hour
1 kJ = 0.277777777777778 W*h
Example: convert 15 kJ to W*h:
15 kJ = 15 × 0.277777777777778 W*h = 4.16666666666667 W*h
Kilojoule to Watt-Hour Conversion Table
| kilojoule | watt-hour |
|---|---|
| 1 kJ | 0.277777777778 W*h |
| 2 kJ | 0.555555555556 W*h |
| 3 kJ | 0.833333333333 W*h |
| 5 kJ | 1.38888888889 W*h |
| 10 kJ | 2.77777777778 W*h |
| 20 kJ | 5.55555555556 W*h |
| 50 kJ | 13.8888888889 W*h |
| 100 kJ | 27.7777777778 W*h |
| 500 kJ | 138.888888889 W*h |
| 1000 kJ | 277.777777778 W*h |
Kilojoule
A kilojoule (kJ) is a unit of energy equal to 1,000 joules, used to quantify energy transfer or work done.
History/Origin
The kilojoule was introduced as part of the International System of Units (SI) to provide a convenient scale for measuring energy, especially in fields like nutrition and physics, replacing the joule for larger quantities.
Current Use
The kilojoule is widely used in nutrition to express food energy content, in physics and engineering to measure energy transfer, and in various scientific and industrial applications within the 'Energy' converter category.
Watt-Hour
A watt-hour (W·h) is a unit of energy equal to the amount of energy transferred or used when one watt of power is sustained for one hour.
History/Origin
The watt-hour was established as a practical unit of energy measurement with the adoption of the International System of Units (SI) and has been used in electrical and energy industries to quantify energy consumption and storage since the 20th century.
Current Use
Watt-hours are commonly used to measure electrical energy consumption in household appliances, batteries, and energy storage systems, providing a convenient unit for billing, capacity ratings, and energy management.
Frequently Asked Questions
What is 1 kilojoule in watt-hour?
1 kilojoule (kJ) = 0.277777777778 watt-hour (W*h).
How do you convert kilojoule to watt-hour?
Multiply the kilojoule value by 0.277777777778. For example, 25 kJ × 0.277777777778 = 6.94444444444 W*h.
What is 10 kilojoule in watt-hour?
10 kJ = 2.77777777778 W*h.
Which unit is larger, the kilojoule or the watt-hour?
The watt-hour is the larger unit: 1 kJ equals only 0.277777777778 W*h.