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.

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 joule = 0.001 kilojoule

1 kilojoule = 1,000 joule

More Energy conversions

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

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