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 kilojoule?

A kilojoule is a unit of energy equal to 1,000 joules. It is commonly used in nutrition to express the energy content of food, as well as in thermodynamics and mechanical engineering.

Worked examples

1 watt hour = 3.6 kilojoule

1 kilojoule = 1,000 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.