Centijoule is 0.01 joule units.
Centijoules to Kilocalories Converter — cJ to kcal
Convert Centijoule (cJ) to Kilocalorie (kcal) using the exact conversion factor (1 centijoule = 0.0000023901 kilocalorie). See the formula, worked examples, and conversion table.
Centijoules to Kilocalories 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.
A kilocalorie is 1,000 calories.
Result = input x 0.01 / 4184.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Centijoules to Kilocalories
Centijoule and Kilocalorie 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 a kilocalorie is 1,000 calories.
Formula
kilocalories = centijoules × 0.00000239005736138
This factor comes from each unit's defined relationship to the category's base unit: 1 centijoule equals 0.01 base units, and 1 kilocalorie equals 4184 base units, so dividing one by the other gives the direct centijoule-to-kilocalorie factor of 0.00000239005736138.
Simple example
1 cJ × 0.000002390057361 = 0.0000023901 kcal
1 centijoule = 0.0000023901 kilocalories.
Real-world example
100 cJ × 0.000002390057361 = 0.0002390057 kcal
100 centijoules = 0.0002390057 kilocalories.
Conversion table
| Centijoule (cJ) | Kilocalorie (kcal) |
|---|---|
| 1 cJ | 0.0000023901 kcal |
| 10 cJ | 0.0000239006 kcal |
| 100 cJ | 0.0002390057 kcal |
| 500 cJ | 0.0011950287 kcal |
| 1,000 cJ | 0.0023900574 kcal |
| 2,000 cJ | 0.0047801147 kcal |
Reverse conversion: Kilocalorie to Centijoule
0.0000023901 kcal × 418400 = 1.00001784 cJ
0.0000023901 kilocalories = 1.00001784 centijoules.
centijoules = kilocalories × 418400
For a page dedicated to this direction, see Kilocalorie to Centijoule.
Understanding the Centijoule (cJ)
Centijoule is 0.01 joule units.
Understanding the Kilocalorie (kcal)
A kilocalorie is 1,000 calories.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilocalories are in 1 centijoule?
1 centijoule equals 0.0000023901 kilocalories, using the exact defined conversion factor rather than an estimate.
How do I convert centijoule to kilocalorie?
Multiply the centijoule value by 0.000002390057361. The converter above does this instantly to whatever precision you set.
How do I convert kilocalorie back to centijoule?
Use the reverse factor: 1 kilocalorie equals 418,400 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 kilocalorie?
Kilocalorie (kcal) is a unit of energy.
Is the centijoule to kilocalorie conversion exact?
Yes. Both centijoule and kilocalorie are defined by fixed standards rather than physical artifacts, so the factor of 0.000002390057361 used above is exact to as many digits as you choose to display.