Joules to kilojoules converter

Convert joules (J) to kilojoules (kJ).

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Edit either value. Decimals and scientific notation supported.

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CONVERSION

1 J ≈ 0.001 kJ

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Precision changes displayed rounding, not calculation accuracy.

FORMULAkJ = J ÷ 1000

FORMULA & EXAMPLES

How to convert Joules to kilojoules

kJ = J ÷ 1000

Divide the J reading by 1000.

Worked examples

1 J ≈ 0.001 kJ

1 ÷ 1000 ≈ 0.001

1000 J ≈ 1 kJ

1000 ÷ 1000 ≈ 1

Joules to kilojoules table

Fixed reference · Joule to Kilojoule

Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.

Joule (J)	Kilojoule (kJ)
0	0
0.1	0.0001
0.5	0.0005
1	0.001
2	0.002
5	0.005
10	0.01
25	0.025
50	0.05
100	0.1
1000	1

Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.

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