Convert joules (J), calories (cal), kilowatt-hours (kWh), BTU, and other energy units. Energy is the capacity to do work; the joule (J) is the SI unit (1 J = 1 N·m). Nutritional calories and electrical kWh use different reference definitions tied to joules.
This energy converter transforms values from Joules (J) to Kilojoules (kJ). Results update instantly using the exact conversion factor.
The joule (J) is the SI unit of energy (1 J = 1 N·m).
The Kilojoules (kJ) is a unit of energy in the Energy category.
1 J ÷ 1000 = 0.001 kJ
kJ = J ÷ 1000
To convert J to kJ, divide the value in J by 1000 (since 1 J = 0.001 kJ). Equivalently, multiply by 0.001. Example: 1 J = 1 J × 0.001 = 0.001 kJ.
10 J = 0.01 kJ ÷ 1000 = 10 J
Common values from J to kJ.
| J | kJ |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| 10 | 0.01 |
| 11 | 0.011 |
| 12 | 0.012 |
| 13 | 0.013 |
| 14 | 0.014 |
| 15 | 0.015 |
| 16 | 0.016 |
| 17 | 0.017 |
| 18 | 0.018 |
| 19 | 0.019 |
| 20 | 0.02 |