Centijoule is 0.01 joule units.
Centijoules to Kilojoules Converter — cJ to kJ
Convert Centijoule (cJ) to Kilojoule (kJ) using the exact conversion factor (1 centijoule = 0.00001 kilojoule). See the formula, worked examples, and conversion table.
Centijoules to Kilojoules converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Kilojoule is 1000 joule units.
Result = input x 0.01 / 1000.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Centijoules to Kilojoules
Centijoule and Kilojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Centijoule is 0.01 joule units, and kilojoule is 1000 joule units.
Formula
kilojoules = centijoules × 0.00001
This factor comes from each unit's defined relationship to the category's base unit: 1 centijoule equals 0.01 base units, and 1 kilojoule equals 1000 base units, so dividing one by the other gives the direct centijoule-to-kilojoule factor of 0.00001.
Simple example
1 cJ × 0.00001 = 0.00001 kJ
1 centijoule = 0.00001 kilojoules.
Real-world example
100 cJ × 0.00001 = 0.001 kJ
100 centijoules = 0.001 kilojoules.
Conversion table
| Centijoule (cJ) | Kilojoule (kJ) |
|---|---|
| 1 cJ | 0.00001 kJ |
| 10 cJ | 0.0001 kJ |
| 100 cJ | 0.001 kJ |
| 500 cJ | 0.005 kJ |
| 1,000 cJ | 0.01 kJ |
| 2,000 cJ | 0.02 kJ |
Reverse conversion: Kilojoule to Centijoule
0.00001 kJ × 100000 = 1 cJ
0.00001 kilojoules = 1 centijoule.
centijoules = kilojoules × 100000
For a page dedicated to this direction, see Kilojoule to Centijoule.
Understanding the Centijoule (cJ)
Centijoule is 0.01 joule units.
Understanding the Kilojoule (kJ)
Kilojoule is 1000 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilojoules are in 1 centijoule?
1 centijoule equals 0.00001 kilojoules, using the exact defined conversion factor rather than an estimate.
How do I convert centijoule to kilojoule?
Multiply the centijoule value by 0.00001. The converter above does this instantly to whatever precision you set.
How do I convert kilojoule back to centijoule?
Use the reverse factor: 1 kilojoule equals 100,000 centijoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a centijoule?
Centijoule (cJ) is a unit of energy.
What is a kilojoule?
Kilojoule (kJ) is a unit of energy.
Is the centijoule to kilojoule conversion exact?
Yes. Both centijoule and kilojoule are defined by fixed standards rather than physical artifacts, so the factor of 0.00001 used above is exact to as many digits as you choose to display.