Kilojoules to Joules Converter
Convert kilojoules (kJ) to joules (watt-seconds) (J), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 kJ = 1000 J
- 1 × 1000 = 1000 J
How to convert kilojoules to joules
1 kJ = 1,000 J, so multiply by 1,000 to go from kilojoules to joules (watt-seconds). Going the other way, 1 J = 0.001 kJ.
J = kJ × 1,000 kJ = J × 0.001
Worked example:
1 kJ = 1000 J 5 × 1000 = 5000 J
Kilojoules to joules table
| Kilojoules | Joules |
|---|---|
| 1 kJ | 1,000 J |
| 2 kJ | 2,000 J |
| 3 kJ | 3,000 J |
| 4 kJ | 4,000 J |
| 5 kJ | 5,000 J |
| 6 kJ | 6,000 J |
| 7 kJ | 7,000 J |
| 8 kJ | 8,000 J |
| 9 kJ | 9,000 J |
| 10 kJ | 10,000 J |
| 15 kJ | 15,000 J |
| 20 kJ | 20,000 J |
| 25 kJ | 25,000 J |
| 30 kJ | 30,000 J |
| 40 kJ | 40,000 J |
| 50 kJ | 50,000 J |
| 75 kJ | 75,000 J |
| 100 kJ | 100,000 J |
| 250 kJ | 250,000 J |
| 500 kJ | 500,000 J |
| 1000 kJ | 1,000,000 J |
About the units
- Kilojoules (kJ)
- Kilojoules, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
- Joules (J)
- Joules (watt-seconds), a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
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