Centijoule is 0.01 joule units.
Centijoules to Millijoules Converter — cJ to mJ
Convert Centijoule (cJ) to Millijoule (mJ) using the exact conversion factor (1 centijoule = 10 millijoule). See the formula, worked examples, and conversion table.
Centijoules to Millijoules converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Millijoule is 0.001 joule units.
Result = input x 0.01 / 0.001.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Centijoules to Millijoules
Centijoule and Millijoule both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Centijoule is 0.01 joule units, and millijoule is 0.001 joule units.
Formula
millijoules = centijoules × 10
This factor comes from each unit's defined relationship to the category's base unit: 1 centijoule equals 0.01 base units, and 1 millijoule equals 0.001 base units, so dividing one by the other gives the direct centijoule-to-millijoule factor of 10.
Simple example
1 cJ × 10 = 10 mJ
1 centijoule = 10 millijoules.
Real-world example
100 cJ × 10 = 1,000 mJ
100 centijoules = 1,000 millijoules.
Conversion table
| Centijoule (cJ) | Millijoule (mJ) |
|---|---|
| 1 cJ | 10 mJ |
| 10 cJ | 100 mJ |
| 50 cJ | 500 mJ |
| 100 cJ | 1,000 mJ |
| 500 cJ | 5,000 mJ |
| 1,000 cJ | 10,000 mJ |
Reverse conversion: Millijoule to Centijoule
10 mJ × 0.1 = 1 cJ
10 millijoules = 1 centijoule.
centijoules = millijoules × 0.1
For a page dedicated to this direction, see Millijoule to Centijoule.
Understanding the Centijoule (cJ)
Centijoule is 0.01 joule units.
Understanding the Millijoule (mJ)
Millijoule is 0.001 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millijoules are in 1 centijoule?
1 centijoule equals 10 millijoules, using the exact defined conversion factor rather than an estimate.
How do I convert centijoule to millijoule?
Multiply the centijoule value by 10. The converter above does this instantly to whatever precision you set.
How do I convert millijoule back to centijoule?
Use the reverse factor: 1 millijoule equals 0.1 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 engineering.
What is a millijoule?
Millijoule (mJ) is a unit of engineering.
Is the centijoule to millijoule conversion exact?
Yes. Both centijoule and millijoule are defined by fixed standards rather than physical artifacts, so the factor of 10 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.