Millijoule is 0.001 joule units.
Millijoules to Centijoules Converter — mJ to cJ
Convert Millijoule (mJ) to Centijoule (cJ) using the exact conversion factor (1 millijoule = 0.1 centijoule). See the formula, worked examples, and conversion table.
Millijoules 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 0.001 / 0.01.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millijoules to Centijoules
Millijoule and Centijoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Millijoule is 0.001 joule units, and centijoule is 0.01 joule units.
Formula
centijoules = millijoules × 0.1
This factor comes from each unit's defined relationship to the category's base unit: 1 millijoule equals 0.001 base units, and 1 centijoule equals 0.01 base units, so dividing one by the other gives the direct millijoule-to-centijoule factor of 0.1.
Simple example
1 mJ × 0.1 = 0.1 cJ
1 millijoule = 0.1 centijoules.
Real-world example
100 mJ × 0.1 = 10 cJ
100 millijoules = 10 centijoules.
Conversion table
| Millijoule (mJ) | Centijoule (cJ) |
|---|---|
| 1 mJ | 0.1 cJ |
| 10 mJ | 1 cJ |
| 100 mJ | 10 cJ |
| 500 mJ | 50 cJ |
| 1,000 mJ | 100 cJ |
| 2,000 mJ | 200 cJ |
Reverse conversion: Centijoule to Millijoule
0.1 cJ × 10 = 1 mJ
0.1 centijoules = 1 millijoule.
millijoules = centijoules × 10
For a page dedicated to this direction, see Centijoule to Millijoule.
Understanding the Millijoule (mJ)
Millijoule is 0.001 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 millijoule?
1 millijoule equals 0.1 centijoules, using the exact defined conversion factor rather than an estimate.
How do I convert millijoule to centijoule?
Multiply the millijoule value by 0.1. The converter above does this instantly to whatever precision you set.
How do I convert centijoule back to millijoule?
Use the reverse factor: 1 centijoule equals 10 millijoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a millijoule?
Millijoule (mJ) is a unit of energy.
What is a centijoule?
Centijoule (cJ) is a unit of energy.
Is the millijoule to centijoule conversion exact?
Yes. Both millijoule and centijoule are defined by fixed standards rather than physical artifacts, so the factor of 0.1 used above is exact to as many digits as you choose to display.