Joules to Kilojoules Converter
Convert joules (J) to kilojoules (kJ) instantly. Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Result
- Kilojoules
- 0.001 kJ
How to use the joules to kilojoules converter
- Enter the joules (J).
- The results update as you type, or press Calculate.
- Read the kilojoules first, then the supporting figures below it.
Formula
Kilojoules = joules × 0.001
Worked example
For example, with these inputs:
- Joules (J): 1
the calculator returns:
- Kilojoules: 0.001 kJ
Joules to Kilojoules table
| Joules | Kilojoules |
|---|---|
| 1 J | 0.001 kJ |
| 2 J | 0.002 kJ |
| 5 J | 0.005 kJ |
| 10 J | 0.01 kJ |
| 20 J | 0.02 kJ |
| 25 J | 0.025 kJ |
| 50 J | 0.05 kJ |
| 100 J | 0.1 kJ |
| 250 J | 0.25 kJ |
| 500 J | 0.5 kJ |
| 1,000 J | 1 kJ |
About this conversion
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Frequently asked questions
How many kilojoules are in one joule?
1 J = 0.001 kJ.
How do I convert J to kJ?
Kilojoules = joules × 0.001.