Kilojoule to Joule
Free instant kilojoule to joule converter. 1 kJ = 1000 J.
Common Kilojoule to Joule values
| Kilojoule (kJ) | Joule (J) |
|---|---|
| 1 | 1000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
How does Kilojoule to Joule conversion work?
Type a value in the Kilojoule (kJ) field and the equivalent in Joule (J) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Kilojoule. 1,000 joules. Common unit on food labels in metric countries.
Joule. The SI unit of energy. About the energy of a small apple falling from waist height.
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🎯 Accurate conversions
Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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