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By Shailendra Singh
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Updated on 5 Mar 2025, 17:19 IST
Joules (J) and kilojoules (kJ) are units of energy in the International System of Units (SI). They are used to measure the amount of energy transferred, converted, or expended.
The joule is the SI unit of energy. It is defined as the amount of energy transferred when a force of one newton is applied over a distance of one meter in the direction of the force. In other words, a joule is the work done when a force of one newton moves an object one meter. Joules are commonly used to measure various forms of energy, such as mechanical, thermal, electrical, and more.
The kilojoule is a larger unit of energy, equal to one thousand joules (1 kJ = 1000 J). It is often used to express larger amounts of energy, such as the energy content of food or the energy output of machines.
1J = 0.001kJ
E(kJ) = E(J) / 1000
Example – Convert 100 joules to kJ
Ans. E(kJ) = 100J / 1000 = 0.1kJ
Also Check: Joules to eV conversion
| Energy (J) | Energy (kJ) |
| 1 J | 0.001 kJ |
| 2 J | 0.002 kJ |
| 3 J | 0.003 kJ |
| 4 J | 0.004 kJ |
| 5 J | 0.005 kJ |
| 6 J | 0.006 kJ |
| 7 J | 0.007 kJ |
| 8 J | 0.008 kJ |
| 9 J | 0.009 kJ |
| 10 J | 0.01 kJ |
| 20 J | 0.02 kJ |
| 30 J | 0.03 kJ |
| 40 J | 0.04 kJ |
| 50 J | 0.05 kJ |
| 60 J | 0.06 kJ |
| 70 J | 0.07 kJ |
| 80 J | 0.08 kJ |
| 90 J | 0.09 kJ |
| 100 J | 0.1 kJ |
| 200 J | 0.2 kJ |
| 300 J | 0.3 kJ |
| 400 J | 0.4 kJ |
| 500 J | 0.5 kJ |
| 600 J | 0.6 kJ |
| 700 J | 0.7 kJ |
| 800 J | 0.8 kJ |
| 900 J | 0.9 kJ |
| 1000 J | 1 kJ |
| 2000 J | 2 kJ |
| 3000 J | 3 kJ |
| 4000 J | 4 kJ |
| 5000 J | 5 kJ |
| 6000 J | 6 kJ |
| 7000 J | 7 kJ |
| 8000 J | 8 kJ |
| 9000 J | 9 kJ |
| 10000 J | 10 kJ |
| 100000 J | 100 kJ |
To convert joules (J) to kilojoules (kJ), you need to divide the number of joules by 1000. This is because 1 kilojoule is equal to 1000 joules.
No, that's not correct. 1 joule is not equal to 1000 kilojoules. Instead, 1 kilojoule is equal to 1000 joules.
Kilojoules (kJ) are bigger than joules (J). This is because 1 kilojoule is equal to 1000 joules, so it's like having 1000 of something instead of just 1.
1 joule of energy is a small amount. It's the energy needed to push or pull something with a force of 1 newton for a distance of 1 meter.
1 joule of energy is equal to doing a small task, like lifting an apple that weighs about 100 grams up to your desk, which is around the height of a typical book.
A joule doesn't directly convert to kilograms (KG) because they measure different things. A joule is a unit of energy, and kilograms measure mass. It's like comparing apples to oranges – they're not the same kind of thing.
1 joule of heat is a small amount of heat energy. It's like the heat you might feel when you touch a warm cup of tea for a moment. Heat is a form of energy that makes things feel warm or hot.
