Energy & Work converter

Joule to Watt-hour Converter

Converts joule to watt-hour for energy.

Enter value

From

Result

0.000278 Wh

1 J = 0.000278 Wh

Also equals

0.001kJ

0kWh

0.000239kcal

0.000278Wh

0.000948BTU

0.737562ft·lb

Decimals

Need the reverse conversion?Watt-hour to Joule Converter

Conversion formula

Wh = J × 0.000277777777778

1 joule equals 0.00027777778 watt-hour.

Joule to Watt-hour table

Joule (J)	Watt-hour (Wh)
0	0
1	0.0003
10	0.0028
20	0.0056
30	0.0083
50	0.0139
100	0.0278
200	0.0556
500	0.1389
1,000	0.2778
10,000	2.7778

About this conversion

This converter uses the displayed definition for joule and its recognized relationship to watt-hour. Calculations retain full precision internally, and only the visible result is rounded. You can swap the conversion direction without changing the underlying standard.

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Convert Joule to other energy & work units

Joule to Kilojoule Joule to Megajoule Joule to Calorie Joule to Kilocalorie Joule to Watt-hour Joule to Kilowatt-hour Joule to BTU Joule to Therm Joule to Foot-pound Joule to Electronvolt Joule to Erg Joule to Ton of TNT Joule to Barrel of Oil Equivalent Joule to Gigajoule Joule to Millijoule Joule to Microjoule Joule to Nanojoule Joule to Hartree (Atomic Unit)Joule to Rydberg Joule to Gigawatt Hour Joule to Megawatt Hour Joule to Kilowatt Second Joule to Watt Second Joule to Newton Meter Joule to Horsepower Hour Joule to Metric Horsepower Hour Joule to Kilocalorie (IT)Joule to Kilocalorie (Th)Joule to Calorie (IT)Joule to Calorie (Th)Joule to MBTU Joule to Ton Hour (Refrigeration)Joule to Foe (Kilotons)Joule to Foe (Barrels)Joule to Gigaton TNT Joule to Megaton TNT Joule to Kiloton TNT Joule to Ton (Explosive)Joule to Dyne Centimeter Joule to Gram-force Meter Joule to Gram-force Centimeter Joule to Kilogram-force Centimeter Joule to Kilogram-force Meter Joule to Kilopond Meter Joule to Pound-force Foot Joule to Pound-force Inch Joule to Ounce-force Inch Joule to Foot Pound Joule to Inch Pound Joule to Inch Ounce Joule to Poundal Foot Joule to Therm (EC)Joule to Therm (US)

Frequently asked questions

How do I convert joules to watt-hours?+

Enter the joules value in the converter. The result uses the defined factor 0.000277777777778 and is rounded only for display.

Does the converter keep full precision?+

Yes. Calculations retain high precision throughout each step, while the visible result is rounded for readability.

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