Joule to Watt-hour Converter
1 J = 0.0002777778 Wh
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FORMULA
1 J = 0.0002777778 Wh
CONVERSION TABLE
| Joule (J) | Watt-hour (Wh) |
|---|---|
| 1 J | 0.0002777778 Wh |
| 5 J | 0.0013888889 Wh |
| 10 J | 0.0027777778 Wh |
| 25 J | 0.0069444444 Wh |
| 50 J | 0.013889 Wh |
| 100 J | 0.027778 Wh |
| 250 J | 0.069444 Wh |
| 500 J | 0.138889 Wh |
| 1,000 J | 0.277778 Wh |
COMMON VALUES
RELATED CONVERSIONS
About Joule (J)
The SI derived unit of energy, one joule equals the work done by a force of one newton moving an object one meter. Named after James Prescott Joule, who demonstrated the mechanical equivalent of heat, the joule is used in physics, chemistry, and engineering for all forms of energy, work, and heat.
About Watt-hour (Wh)
One watt sustained for one hour equals 3,600 joules. The watt-hour is used for small-scale electrical energy measurements such as battery capacity in consumer electronics. A smartphone battery typically holds 10-20 Wh, and laptop batteries range from 40 to 100 Wh.
How to Convert Joule to Watt-hour
The conversion formula is: 1 J = 0.0002777778 Wh. To convert from Joule (J) to Watt-hour (Wh), use the formula above or the interactive converter at the top of this page.
Frequently Asked Questions
How many Watt-hour in 1 Joule?
1 Joule (J) equals 0.0002777778 Watt-hour (Wh).
How to convert Joule to Watt-hour?
Multiply the Joule value by 0.0002777778 to get the equivalent in Watt-hour. Formula: 1 J = 0.0002777778 Wh
What is the formula for Joule to Watt-hour conversion?
1 J = 0.0002777778 Wh
Glossary
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Calorie
A unit of energy. The small calorie (cal) heats 1g of water by 1°C; the food Calorie (kcal) is 1000 small calories.
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BTU (British Thermal Unit)
The amount of heat needed to raise the temperature of one pound of water by one degree Fahrenheit.
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Electronvolt
A unit of energy equal to the kinetic energy gained by an electron accelerated through 1 volt.
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Joule
The SI unit of energy, equal to the work done by a force of one newton acting over a distance of one meter (1 J = 1 N·m = 1 kg·m²/s²).