Convert kilojoule to joule
Please provide values below to convert kilojoule [kJ] to joule [J], or Convert joule to kilojoule.
1 kJ = 1000 J. To convert kilojoule to joule, multiply the value by 1000; to go the other way, divide by it (1 J = 0.001 kJ). Both units measure energy and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 kJ = 1000 J
- 1 J = 0.001 kJ
- 10 kJ = 10000 J
- 100 kJ = 100000 J
How to Convert Kilojoule to Joule
1 kJ = 1000 J
Example: convert 15 kJ to J:
15 kJ = 15 × 1000 J = 15000 J
Kilojoule to Joule Conversion Table
| kilojoule | joule |
|---|---|
| 1 kJ | 1000 J |
| 2 kJ | 2000 J |
| 3 kJ | 3000 J |
| 5 kJ | 5000 J |
| 10 kJ | 10000 J |
| 20 kJ | 20000 J |
| 50 kJ | 50000 J |
| 100 kJ | 100000 J |
| 500 kJ | 500000 J |
| 1000 kJ | 1000000 J |
Kilojoule
A kilojoule (kJ) is a unit of energy equal to 1,000 joules, used to quantify energy transfer or work done.
History/Origin
The kilojoule was introduced as part of the International System of Units (SI) to provide a convenient scale for measuring energy, especially in fields like nutrition and physics, replacing the joule for larger quantities.
Current Use
The kilojoule is widely used in nutrition to express food energy content, in physics and engineering to measure energy transfer, and in various scientific and industrial applications within the 'Energy' converter category.
Joule
The joule (J) is the SI unit of energy, work, and heat, defined as the work done when a force of one newton acts over a distance of one meter.
History/Origin
The joule was named after James Prescott Joule in 1889 to honor his work in energy and thermodynamics. It was adopted as the SI unit of energy in 1948.
Current Use
The joule is widely used in physics, engineering, and everyday contexts to quantify energy, work, and heat in various applications, including electricity, mechanics, and thermodynamics.
Frequently Asked Questions
What is 1 kilojoule in joule?
1 kilojoule (kJ) = 1000 joule (J).
How do you convert kilojoule to joule?
Multiply the kilojoule value by 1000. For example, 25 kJ × 1000 = 25000 J.
What is 10 kilojoule in joule?
10 kJ = 10000 J.
Which unit is larger, the kilojoule or the joule?
The kilojoule is the larger unit: 1 kJ = 1000 J.