Kilojoules to Joules Converter
1 kilojoule = 1,000 joules
1 kilojoule equals 1,000 joules
How to convert kilojoules to joules
Calories here are thermochemical (4.184 J), while BTU uses the International Table definition. A kilowatt-hour is energy (3.6 MJ), not power; a food Calorie is a kilocalorie.
J = kJ × 1000One kilojoule is 1000 joules, so a single multiplication converts any value.
10,000 J = 10 × 1000Kilojoules to joules conversion table
Common values in kilojoules, converted to joules.
| Kilojoules (kJ) | Joules (J) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
About these units
kilojoulekJ
One thousand joules. The metric food-energy unit outside the United States.
jouleJ
The SI derived unit of energy: one newton acting through one metre.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.