How to Convert Joules to Kilojoules
To convert joules to kilojoules, divide the value by 1000.
The Formula
Kilojoules = Joules ÷ 1000
Key Fact
1 kilojoule = 1000 joules
Tip: To convert kilojoules back to joules, multiply by 1000.
Joules to Kilojoules
Convert joules (J) to kilojoules (kJ) with formulas, examples, and conversion tables.
J
kJ
1 J = 0.001 kJ
Full precision:0.001 kJ
Step-by-Step Solution
To convert 1 joules to kilojoules, we divide by 1000 because one kilojoule equals exactly 1000 joules.
1 kilojoule = 1000 joules
Since there are 1000 joules in every kilojoule, we divide our value by this factor:
1 ÷ 1000 = 0.001 kilojoules
So 1 joules = 0.001 kilojoules.
Quick check: 0.001 × 1000 = 1 joules
Example Conversions
Example 1: 1 J = 0.001 kJ
1 ÷ 1000 = 0.001
1 ÷ 1000 = 0.001
Example 2: 5 J = 0.005 kJ
5 ÷ 1000 = 0.005
5 ÷ 1000 = 0.005
Example 3: 10 J = 0.01 kJ
10 ÷ 1000 = 0.01
10 ÷ 1000 = 0.01
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 |
| 1000 J | 1 kJ |
1 Joule in Other Units
| Unit | 1 J = |
|---|---|
| Joules to Kilojoules | 0.001 kJ |
| Joules to Megajoules | 0.000001 MJ |
| Joules to Gigajoules | 1e-9 GJ |
| Joules to Watt-hours | 0.000278 Wh |
| Joules to Kilowatt-hours | 2.78e-7 kWh |
| Joules to Megawatt-hours | 2.78e-10 MWh |
| Joules to Calories | 0.239006 cal |
| Joules to Kilocalories | 0.000239 kcal |
| Joules to BTU | 0.000948 BTU |
| Joules to Therms | 9.48e-9 therm |
| Joules to Foot-pounds | 0.737561 ft·lb |
| Joules to Electronvolts | 6.24e+18 eV |
| Joules to Ergs | 10000000 erg |