ENERGY CONVERSION
Kilojoule to Joule.
Convert kilojoule (kJ) to joule (J), with the math explained.
THE MATH, MADE SIMPLE
How to convert kilojoule to joule
Multiply your kilojoule value by 1,000 to get the equivalent in joule. Both units are normalized through the joule.
J = kJ × 1,00010 kJ = 10,000 J
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
kJ to J conversion table
| Kilojoule (kJ) | Joule (J) |
|---|---|
| 1 kJ | 1,000 J |
| 2 kJ | 2,000 J |
| 5 kJ | 5,000 J |
| 10 kJ | 10,000 J |
| 20 kJ | 20,000 J |
| 50 kJ | 50,000 J |
| 100 kJ | 100,000 J |
| 500 kJ | 500,000 J |
| 1,000 kJ | 1,000,000 J |
About the kilojoule
The kilojoule (kJ) is a unit of energy. One kilojoule equals 1,000 joule (base unit) in this calculator.
All kilojoule conversionsAbout the joule
The joule (J) is a unit of energy. One joule equals 1 joule (base unit) in this calculator.
All joule conversionsCommon questions
What is 1 kJ in J?
One kilojoule equals 1,000 J. Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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