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.

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.

Worked examples

1 kilojoule = 0.27777778 watt hour

1 watt hour = 3,600 joule

More Energy conversions

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

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