kJ to joules converter

1 kilojoule equals 1,000 joules. Conversions use J = kJ × 1000

kJ → 1,000 J

J = kJ × 1000

Converter

Worked examples

1 kJ = 1,000 J
2 kJ = 2,000 J
5 kJ = 5,000 J
10 kJ = 10,000 J
100 kJ = 100,000 J

kilojoules to joules conversion table

kJ	J	Arithmetic
1 kJ	1,000 J	× 1000
2 kJ	2,000 J	× 1000
3 kJ	3,000 J	× 1000
4 kJ	4,000 J	× 1000
5 kJ	5,000 J	× 1000
6 kJ	6,000 J	× 1000
8 kJ	8,000 J	× 1000
10 kJ	10,000 J	× 1000
12 kJ	12,000 J	× 1000
15 kJ	15,000 J	× 1000
20 kJ	20,000 J	× 1000
25 kJ	25,000 J	× 1000
30 kJ	30,000 J	× 1000
40 kJ	40,000 J	× 1000
50 kJ	50,000 J	× 1000
60 kJ	60,000 J	× 1000
70 kJ	70,000 J	× 1000
80 kJ	80,000 J	× 1000
90 kJ	90,000 J	× 1000
100 kJ	100,000 J	× 1000

How to convert kJ to J

Take your value in kilojoules.
Multiply by 1000
That is your answer in joules — no rounding needed until you choose a display precision.

Related conversions

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Questions

How many joules in 1 kilojoule?

Exactly 1,000 J. The factor follows from the definitions of both units, not from a measurement, so it is exact.

How do I convert kJ to J?

Multiply the kilojoules figure by 1000 — or use the converter above, which updates as you type.

Is kJ to J the same as J to kJ?

No — they are inverses. One kJ is 1,000 J, while one J is 0.001 kJ.

What is 1 kJ in J?

1 kJ = 1,000 J (see the value page for the full arithmetic).