Kilojoule is 1000 joule units.
Kilojoules to Centijoules Converter — kJ to cJ
Convert Kilojoule (kJ) to Centijoule (cJ) using the exact conversion factor (1 kilojoule = 100,000 centijoule). See the formula, worked examples, and conversion table.
Kilojoules to Centijoules 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.
Centijoule is 0.01 joule units.
Result = input x 1000 / 0.01.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilojoules to Centijoules
Kilojoule and Centijoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Kilojoule is 1000 joule units, and centijoule is 0.01 joule units.
Formula
centijoules = kilojoules × 100000
This factor comes from each unit's defined relationship to the category's base unit: 1 kilojoule equals 1000 base units, and 1 centijoule equals 0.01 base units, so dividing one by the other gives the direct kilojoule-to-centijoule factor of 100000.
Simple example
1 kJ × 100000 = 100,000 cJ
1 kilojoule = 100,000 centijoules.
Real-world example
100 kJ × 100000 = 10,000,000 cJ
100 kilojoules = 10,000,000 centijoules.
Conversion table
| Kilojoule (kJ) | Centijoule (cJ) |
|---|---|
| 1 kJ | 100,000 cJ |
| 10 kJ | 1,000,000 cJ |
| 100 kJ | 10,000,000 cJ |
| 500 kJ | 50,000,000 cJ |
| 1,000 kJ | 100,000,000 cJ |
| 2,000 kJ | 200,000,000 cJ |
Reverse conversion: Centijoule to Kilojoule
1 cJ × 0.00001 = 0.00001 kJ
1 centijoule = 0.00001 kilojoules.
kilojoules = centijoules × 0.00001
For a page dedicated to this direction, see Centijoule to Kilojoule.
Understanding the Kilojoule (kJ)
Kilojoule is 1000 joule units.
Understanding the Centijoule (cJ)
Centijoule is 0.01 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many centijoules are in 1 kilojoule?
1 kilojoule equals 100,000 centijoules, using the exact defined conversion factor rather than an estimate.
How do I convert kilojoule to centijoule?
Multiply the kilojoule value by 100000. The converter above does this instantly to whatever precision you set.
How do I convert centijoule back to kilojoule?
Use the reverse factor: 1 centijoule equals 0.00001 kilojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilojoule?
Kilojoule (kJ) is a unit of energy.
What is a centijoule?
Centijoule (cJ) is a unit of energy.
Is the kilojoule to centijoule conversion exact?
Yes. Both kilojoule and centijoule are defined by fixed standards rather than physical artifacts, so the factor of 100000 used above is exact to as many digits as you choose to display.