Kilojoule to Watt-hour Conversion
Convert between Kilojoule and Watt-hour quickly and accurately.
How to Convert Kilojoule to Watt-hour
Conversion Formula
Example
Convert 15 kJ to W⋅h:
Unit Information
Learn about the energy units you're converting between
Kilojoule
kJ
Definition
A kilojoule (symbol: kJ) is a unit of energy equal to 1,000 joules. It is commonly used for measuring larger amounts of energy in food, exercise, and industrial applications. One kilojoule equals approximately 0.239 kilocalories.
History/Origin
The kilojoule was introduced as a practical unit for measuring larger energy quantities in the metric system. It became widely used in the late 20th century for food labeling and energy consumption measurements.
Current Use
Kilojoules are extensively used in nutrition labeling worldwide, exercise physiology for measuring energy expenditure, industrial energy consumption monitoring, and scientific research for measuring moderate energy quantities.
Multiplier
1000
Offset
0
Watt-hour
W⋅h
Definition
A watt-hour (symbol: Wh) is a unit of energy equal to the amount of energy consumed by a 1-watt device running for one hour. It equals 3,600 joules and is commonly used for small electrical devices and batteries.
History/Origin
The watt-hour was introduced alongside the kilowatt-hour for measuring smaller amounts of electrical energy. It became important with the development of portable electronic devices and battery-powered systems.
Current Use
Watt-hours are used for measuring battery capacity in portable devices, calculating energy consumption of small electrical appliances, monitoring energy usage in electronics, and determining battery life in mobile devices.
Multiplier
3600
Offset
0
Kilojoule to Watt-hour Conversion Table
| Kilojoule [kJ] | Watt-hour [W⋅h] |
|---|---|
| 1 kJ | 0.277778 W⋅h |
| 10 kJ | 2.777778 W⋅h |
| 25 kJ | 6.944444 W⋅h |
| 50 kJ | 13.888889 W⋅h |
| 100 kJ | 27.777778 W⋅h |
| 0 kJ | 0E+0 W⋅h |
| -10 kJ | -2.777778 W⋅h |
| -40 kJ | -11.111111 W⋅h |
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