Joules to Kilojoules Converter
Convert J to kJ instantly — and see every other energy unit at once.
1 J=0.001 kJ
1 J in every unit
Joulesfrom
1J
Kilojoules
0.001kJ
Megajoules
1.0000e-6MJ
Watt-hours
2.7778e-4Wh
Kilowatt-hours
2.7778e-7kWh
Calories (small)
0.239006cal
Kilocalories (kcal)
2.3901e-4kcal
BTU
9.4781e-4BTU
Electronvolts
6,241,509,074,460,763,000eV
Foot-pounds
0.737561ft·lb
Common Joules to Kilojoules conversions
| Joules (J) | Kilojoules (kJ) |
|---|---|
| 1 J | 0.001 kJ |
| 2 J | 0.002 kJ |
| 5 J | 0.005 kJ |
| 10 J | 0.01 kJ |
| 25 J | 0.025 kJ |
| 50 J | 0.05 kJ |
| 100 J | 0.1 kJ |
| 250 J | 0.25 kJ |
| 500 J | 0.5 kJ |
| 1000 J | 1 kJ |
The formula
Joules (J) — a unit of energy.
Kilojoules (kJ) — a unit of energy.
Worked examples
1 J→0.001 kJ
Apply Joules ÷ 1000 with input = 1. Result: 0.001 kJ.
5 J→0.005 kJ
Apply Joules ÷ 1000 with input = 5. Result: 0.005 kJ.
10 J→0.01 kJ
Apply Joules ÷ 1000 with input = 10. Result: 0.01 kJ.
FAQ
How do I convert Joules to Kilojoules?
Use the formula: kJ = Joules ÷ 1000. You can also use the converter above — type any value and the result updates instantly.
Where are Joules used?
Joules (J) — a unit of energy.
Where are Kilojoules used?
Kilojoules (kJ) — a unit of energy.
How do I convert Kilojoules back to Joules?
Use the Kilojoules to Joules converter.