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Convert kilojoule to joule

Here you can quickly calculate how many joule fit in one kilojoule.
write a number and we convert instantly
swap direction → TWh

- scroll: formula · table · questions -

  • 1 kJ = 1000 J
  • 1 J = 0.001 kJ

Example: kilojoule to joule

  • 1 kilojoule = 1000 joule

Kilojoule to joule conversion table

kilojoule joule
1 1000
2 2000
5 5000
10 10000
20 20000
50 50000
100 100000

Kilojoule to joule formula

To convert kilojoule to joule, multiply by 1000.

1 kJ = 1000 J
Example: 1 kilojoule = 1000 joule

Common energy conversion mistakes

  • The relationship is exact: 1 kWh = 3.6 MJ (3,600 kJ, because an hour has 3,600 seconds). The common slip is dividing when you should multiply: 10 kWh is 36 MJ, not 2.8. Remember the direction: kWh → MJ means times 3.6.

Quick kilojoule and joule conversion quiz

Score: 0

228 kilojoule equals 228 000 joule.

Correct answer: 228 kilojoule = 228 000 joule.

46 joule equals 0.046 kilojoule.

Correct answer: 46 joule = 0.046 kilojoule.

176 kilojoule equals 176 000 joule.

Correct answer: 176 kilojoule = 176 000 joule.

11.9 joule equals 0.0179 kilojoule.

Correct answer: 11.9 joule = 0.0119 kilojoule.

16.3 kilojoule equals 16 300 joule.

Correct answer: 16.3 kilojoule = 16 300 joule.

More energy conversions