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Joules to kilojoules

1 J = 0.001 kJ

⇄
kilojoules (kJ)0.001

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Formula

Multiply the value in J by 0.001 to get kJ.

kJ = J × 0.001

Conversion table

joules (J)kilojoules (kJ)
0.10.0001
0.50.0005
10.001
20.002
30.003
40.004
50.005
60.006
70.007
80.008
90.009
100.01
150.015
200.02
250.025
300.03
400.04
500.05
750.075
1000.1
2500.25
5000.5
1,0001

Frequently asked questions

How many kJ are in 1 J?

1 J = 0.001 kJ.

How do I convert J to kJ?

Multiply the value in J by 0.001 to get kJ. kJ = J × 0.001

What is 10 J in kJ?

10 J = 0.01 kJ.

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Updated November 9, 2026