Kilojoules to joules
Type a value in kJ to get it in J instantly.
100,000J
That's 2× as much energy as a phone charge, while a banana is 4.4× more. That could lift a one-tonne car 10.2 m into the air.
What it means
What could that energy do?
The hill climb ignores friction and assumes a 1,000 kg car. Food calories on labels are kilocalories.
The math
How to convert kJ to J
To convert kilojoules to joules, multiply by 1,000.
Example: 100 kJ × 1,000 = 100,000 J.
In the other direction, 1 J = 0.001 kJ.
Every unit
Your energy in every unit
Tables
kJ to J conversion table
| kJ | J |
|---|---|
| 1 kJ | 1,000 J |
| 2 kJ | 2,000 J |
| 5 kJ | 5,000 J |
| 10 kJ | 10,000 J |
| 15 kJ | 15,000 J |
| 20 kJ | 20,000 J |
| 25 kJ | 25,000 J |
| 50 kJ | 50,000 J |
| 75 kJ | 75,000 J |
| 100 kJ | 100,000 J |
| 150 kJ | 150,000 J |
| 200 kJ | 200,000 J |
| 500 kJ | 500,000 J |
| 1,000 kJ | 1,000,000 J |
J to kJ conversion table
| J | kJ |
|---|---|
| 1 J | 0.001 kJ |
| 2 J | 0.002 kJ |
| 5 J | 0.005 kJ |
| 10 J | 0.01 kJ |
| 15 J | 0.015 kJ |
| 20 J | 0.02 kJ |
| 25 J | 0.025 kJ |
| 50 J | 0.05 kJ |
| 75 J | 0.075 kJ |
| 100 J | 0.1 kJ |
| 150 J | 0.15 kJ |
| 200 J | 0.2 kJ |
| 500 J | 0.5 kJ |
| 1,000 J | 1 kJ |
Quick answers
Quick answers
- How many J is 1 kJ?
- 1 kJ is 1,000 J.
- How many J is 10 kJ?
- 10 kJ is 10,000 J.
- How many J is 100 kJ?
- 100 kJ is 100,000 J.
The units
About these units
Kilojoules (kJ)
A kilojoule is 1,000 joules. Food labels outside the US give energy in kilojoules, usually alongside kilocalories.
Joules (J)
The joule is the SI unit of energy: the work done pushing with one newton over one meter. Lifting an apple a meter takes about one joule.
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