NiftyRecipe Online energy conversion
kWh/MJ 3.6 kJ/MJ 0.001 BTU/kcal 0.252164 kcal/MJ 0.004184 MJ/kWh 0.277778 kcal/BTU 3.965667
kJ / J

Kilojoule to Joule converter

1 kJ = 1000 J

This is the Kilojoule to Joule converter. 1 kJ = 1000.0 J.

Enter a value and click Calculate - opens the page with the new result

Common values

joule to kilojoule

Same amount, other units

1 kilojoule → kcal 1 kilojoule → BTU 1 kilojoule → cal 1 kilojoule → kWh 1 kilojoule → MJ

Related converters

kJ → kcal kJ → BTU kJ → cal kJ → kWh kJ → MJ
Formula: kilojoule to joule

J = kJ × 1000 (1 KJ = 1000 J)

Reference values: kilojoule → joule
kJ J
1 kJ 1000 J
100 kJ 100000 J
200 kJ 200000 J
500 kJ 500000 J
1000 kJ 1000000 J
2000 kJ 2000000 J
Common conversions
1 kJ → 1000 J
FAQ for kJ → J
How many kJ in 1 MJ?

Exactly 1000 kJ. Larger or mixed conversions still follow the fixed chain used by the calculator.

When is MJ more practical than kJ?

For larger totals-process energy, some statistical tables. Food labels usually stay in kJ or kcal.

Manual formula?

J = kJ × 1000 (1 KJ = 1000 J)

Reverse factor?

1 joule ≈ 0.001 kilojoule.

How much is 1 kilojoule in joule?

1000 joule (1 kilojoule = 1000 joule).

How the Kilojoule to Joule converter works

This hub describes the pair, not a single number.

NiftyRecipe shows the factor and selected amount pages.