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Joules to kilojoules

1 joule in kilojoules
1 J = 0.001 kJ
kJ = J × 0.001

To convert joules to kilojoules, multiply by 0.001. The table below gives the values people look up most often, and the converter works for any number.

Joules to kilojoules table

Common joule values converted to kilojoules.
Joules Kilojoules
1 J 0.001
2 J 0.002
3 J 0.003
4 J 0.004
5 J 0.005
10 J 0.01
15 J 0.015
20 J 0.02
25 J 0.025
30 J 0.03
40 J 0.04
50 J 0.05
75 J 0.075
100 J 0.1
250 J 0.25
500 J 0.5
1,000 J 1

How the conversion works

The relationship is kJ = J × 0.001. Both units measure energy, so the conversion is a fixed factor that never changes.

Common questions

How many kilojoules are in one joule?
One joule equals 0.001 kilojoules. kJ = J × 0.001.
How do you convert joules to kilojoules?
Use kJ = J × 0.001. So 10 J is 0.01 kJ.
How many joules are in one kilojoule?
One kilojoule equals 1,000 joules, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked