What is watt hour?

A watt hour is a unit of energy equal to the power of one watt sustained for one hour. It is used to measure small amounts of electrical energy consumption, particularly in battery capacities and portable electronics.

What is joule?

The joule is the SI base unit of energy. It is the standard unit for work, heat, and electrical energy in physics, engineering, and scientific measurement worldwide.

Worked examples

1 watt hour = 3,600 joule

1 joule = 1 joule

More Energy conversions

• Convert watt hour to joule
• Convert watt hour to kilojoule
• Convert watt hour to kilowatt hour
• Convert watt hour to calorie (thermochemical)
• Convert watt hour to kilocalorie (dietary)
• Convert watt hour to megajoule
• Convert watt hour to electronvolt
• Convert watt hour to British thermal unit
• Convert watt hour to therm (US)

Assumption: calorie means thermochemical calorie, and therm means US therm.