A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix.
Centijoules to Millijoules
Convert Centijoule (cJ) to Millijoule (mJ) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Energy calculator
Energy Converter
Convert centijoules (cJ) to millijoules (mJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
mJ = cJ × 10
Results update instantly for Centijoules to Millijoules conversions.
Reserved above the conversion cards and below the converter.
Formula
mJ = cJ × 10
cJ = mJ × 0.1
Conversion table
| 1 cJ | 10 mJ |
| 5 cJ | 50 mJ |
| 10 cJ | 100 mJ |
| 20 cJ | 200 mJ |
| 50 cJ | 500 mJ |
| 100 cJ | 1000 mJ |
| 500 cJ | 5000 mJ |
| 1000 cJ | 10000 mJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both centijoule and millijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in centijoules by 10 to get millijoules. To reverse the conversion, multiply a millijoule value by 0.1 to get back to centijoules.
Frequently asked questions
What is Centijoule (cJ)?
A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix.
What is Millijoule (mJ)?
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
How do I convert centijoules to millijoules?
Multiply the centijoule value by 10 to get the equivalent in millijoules. For example, 5 cJ × 10 = 50 mJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 10 is an exact, non-rounded value.
Can I convert millijoules back to centijoules?
Yes. Divide the millijoule value by 10, or multiply it by 0.1, to get centijoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting centijoules to millijoules
A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix. A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
Use this calculator to move between centijoules and millijoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.