Joule [J] to Watt-hour [Wh] Converter

Quick Reference

1 Joule (J) = 0.0002777777778 Watt-hour (Wh)

1 Watt-hour (Wh) = 3600 Joule (J)

Origin value

Target value

Round result

How to Convert Joule to Watt-hour

1 J = 0.0002777777778 Wh
1 Wh = 3600 J

To convert Joule to Watt-hour, divide the value by 3600 (equivalently, multiply by 0.0002777777778). To convert Watt-hour back to Joule, multiply by 3600.

Example: convert 10 J to Wh:
10 J = 10 x 0.0002777777778 = 0.002777777778 Wh

↔ Convert Watt-hour to Joule

Joule

Definition: The joule (symbol: J) is the SI derived unit of energy. It is defined as the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre (1 newton metre or N⋅m).

History/origin: Named after James Prescott Joule, an English physicist. Joule experimentally determined the mechanical equivalent of heat.

Current use: Used universally in science and engineering to quantify energy, work, and heat. Examples include kinetic energy, potential energy, and heat content of materials.

Watt-hour

Definition: A watt-hour (symbol Wh) is a unit of energy equal to one watt of power sustained for one hour. It is commonly used to measure electrical energy consumption.

History/origin: The watt-hour is derived from the watt, the SI unit of power, and the hour, a unit of time. It was developed alongside the increasing use of electricity in the late 19th and early 20th centuries.

Current use: Watt-hours are commonly used to measure the energy capacity of batteries, the energy consumption of household appliances, and the amount of electricity generated or consumed by power plants and consumers.

Joule to Watt-hour Conversion Table

Joule [J]	Watt-hour [Wh]
1 J	0.0002777777778 Wh
2 J	0.0005555555556 Wh
5 J	0.001388888889 Wh
10 J	0.002777777778 Wh
20 J	0.005555555556 Wh
50 J	0.01388888889 Wh
100 J	0.02777777778 Wh
200 J	0.05555555556 Wh
500 J	0.1388888889 Wh
1000 J	0.2777777778 Wh