Kilojoule → Joule (kJ → J)

1 kJ = 1000 J
1 Kilojoule (kJ) = 1000 Joule (J).

Kilojoule (kJ):


Joule (J):

If you want to reverse convert, use Joule → Kilojoule. 1 J = 0.001 kJ. You can also explore the full Energy converter page for more cross conversions.

Conversion formula

Kilojoule to Joule formula: value in J = value in kJ × 1000.

Joule to Kilojoule formula: value in kJ = value in J × 0.001.

How to convert Kilojoule to Joule

To convert Kilojoule to Joule, multiply the value in kJ by 1000. This gives the result in J.

For example, 1 kJ = 1000 J and 10 kJ = 10000 J.

What is Kilojoule?

Kilojoule (kJ): Useful for food-energy values and heat calculations without large joule totals. 1 kJ = 1000 J; 4.184 kJ = 1 kcal.

What is Joule?

Joule (J): The SI energy unit connects mechanical work with electrical energy. 1 J = 1 N·m = 1 W·s.

FAQ

Kilojoule → other Energy units

• 1 kilojoule → joule = 1000 joule
• 1 kilojoule → megajoule = 0.001 megajoule
• 1 kilojoule → calorie = 239.00573613767 calorie
• 1 kilojoule → kilocalorie = 0.23900573613767 kilocalorie
• 1 kilojoule → watt hour = 0.27777777777778 watt hour
• 1 kilojoule → kilowatt hour = 0.00027777777777778 kilowatt hour
• 1 kilojoule = 2.7777777777778E-7 megawatt hour
• 1 kilojoule → british thermal unit = 0.94781339449889 british thermal unit
• 1 kilojoule → foot pound = 737.5610331755 foot pound
• 1 kilojoule = 6.2415090744608E+15 mega electron volt
• 1 kilojoule = 6.2415090744608E+21 electron volt

Kilojoule → Joule Table

The table below shows common values from Kilojoule to Joule and the reverse direction for quick reference.

Joule → Kilojoule Table

Joule → Kilojoule

The reverse value is 1 J = 0.001 kJ.