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Kilojoules to joules

1 kilojoule in joules
1 kJ = 1,000 J
J = kJ × 1,000

To convert kilojoules to joules, multiply by 1,000. The table below gives the values people look up most often, and the converter works for any number.

Kilojoules to joules table

Common kilojoule values converted to joules.
Kilojoules Joules
1 kJ 1,000
2 kJ 2,000
3 kJ 3,000
4 kJ 4,000
5 kJ 5,000
10 kJ 10,000
15 kJ 15,000
20 kJ 20,000
25 kJ 25,000
30 kJ 30,000
40 kJ 40,000
50 kJ 50,000
75 kJ 75,000
100 kJ 100,000
250 kJ 250,000
500 kJ 500,000
1,000 kJ 1,000,000

How the conversion works

The relationship is J = kJ × 1,000. Both units measure energy, so the conversion is a fixed factor that never changes.

Common questions

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