Convert Joules to Kilojoules
1 J = 0.001 kJ
Conversion Table
| joules (J) | kilojoules (kJ) |
|---|---|
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
How to Convert joules to kilojoules
To convert joules to kilojoules, multiply the value by the conversion factor:
For example: 10 J = 0.01 kJ
About joules and kilojoules
The Conversion Formula
To convert joules to kilojoules, multiply the value by the conversion factor: 1 J = 0.001 kJ. For a worked example, suppose you need to convert 25 J to kilojoules: 25 × 0.001 = 0.025 kJ. To convert in the opposite direction, divide by 0.001, or equivalently multiply by 1000.
About joules
The Joule (J) is the standard unit of energy in the International System of Units (SI). It is named after James Prescott Joule, who proved that heat is a form of energy. One Joule is the work done by a force of one Newton moving an object one meter. It is a small unit: lifting a small apple one meter takes about 1 Joule. joules are commonly used in Scientific research, Physics education, Electronics ratings, and Kinetic energy calculations, Work done.
The energy of a heartbeat is roughly 1 Joule.
About kilojoules
The kilojoule (kJ) is the standard unit for food energy in most of the world (Australia, Europe, etc.), replacing the Calorie. One food Calorie (kcal) is approximately 4.2 kJ. It provides a more precise measure of energy intake than the large Calorie. kilojoules are commonly used in Food labels (Global), Exercise machines, Diet planning, and Thermodynamics, Metabolic rate tracking.
A slice of bread has about 300-400 kJ.
When Would You Convert joules to kilojoules?
Converting between joules and kilojoules is one of the most common energy conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 J = 0.001 kJ) memorized or bookmarked can save time in professional and everyday contexts alike.