How Many Joules in a Kilojoule?

Quick Answer
1 Kilojoule = 1,000 Joules

1 kJ = 1,000 J

Formula

J = kJ × 1,000

Conversion Table

Kilojoules (kJ)Joules (J)
1 kJ1,000 J
2 kJ2,000 J
5 kJ5,000 J
10 kJ10,000 J
20 kJ20,000 J
50 kJ50,000 J
100 kJ100,000 J
500 kJ500,000 J
1,000 kJ1,000,000 J

Worked Examples

Convert 5 kJ to J:
5 kJ × 1,000 = 5,000 J
Convert 10 kJ to J:
10 kJ × 1,000 = 10,000 J
Convert 50 kJ to J:
50 kJ × 1,000 = 50,000 J

FAQ

How many Joules are in 1 Kilojoule?
There are 1,000 Joules in 1 Kilojoule. Formula: J = kJ × 1,000.
How to convert Kilojoules to Joules?
To convert Kilojoules to Joules, multiply the number of Kilojoules by 1,000. For example, 10 kJ = 10,000 J.
How many Joules are in 100 Kilojoules?
There are 100,000 Joules in 100 Kilojoules. Calculation: 100 × 1,000 = 100,000.