Kilojoules to Joules

One kilojoule is 1,000 joules. Energy units for food, electricity and physics. The "calorie" on a nutrition label is a kilocalorie — 1,000 of the calories used in physics.

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From

To1,000

1 kilojoule = 1,000 joules · open this conversion

Formula

joules = kilojoules × 1,000

A food Calorie (capital C) is a kilocalorie. The thermochemical calorie of 4.184 J is used here.

Kilojoules to Joules table

Kilojoules	Joules
1 kJ	1,000 J
2 kJ	2,000 J
5 kJ	5,000 J
10 kJ	10,000 J
20 kJ	20,000 J
25 kJ	25,000 J
50 kJ	50,000 J
100 kJ	100,000 J
150 kJ	150,000 J
200 kJ	200,000 J
250 kJ	250,000 J
300 kJ	300,000 J
400 kJ	400,000 J
500 kJ	500,000 J
600 kJ	600,000 J
800 kJ	800,000 J
1,000 kJ	1,000,000 J
1,500 kJ	1,500,000 J
2,000 kJ	2,000,000 J
2,500 kJ	2,500,000 J

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Other energy conversions

⇄ Joules to Kilojoules Kilojoules to Calories Kilojoules to Kilocalories Kilojoules to Watt hours Kilojoules to Kilowatt hours

Frequently asked questions

▸How many joules are in a kilojoule?

One kilojoule is 1,000 joules. joules = kilojoules × 1,000.

▸How do I convert kilojoules to joules?

Multiply the number of kilojoules by 1,000. For example, 10 kJ × 1,000 = 10,000 J.

▸What is the difference between kilojoules and joules?

Kilojoule (kJ) and Joule (J) both measure energy. Energy units for food, electricity and physics. The "calorie" on a nutrition label is a kilocalorie — 1,000 of the calories used in physics.

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