Kilojoule to Joule
Convert kJ to J instantly — free, no sign-up.
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About the Kilojoule (kJ)
The Kilojoule is equal to 1,000 joules, the unit used on nutrition labels in most countries outside the US alongside (or instead of) Calories.
About the Joule (J)
The Joule is the SI unit of energy, defined as the work done by one newton of force over one meter — a single joule is roughly the energy released dropping an apple one meter.
How to convert kJ to J
- Enter the value in kJ in the box above.
- The J equivalent updates instantly.
- Use the swap button to convert J back to kJ just as easily.