Centijoule is 0.01 joule units.
Centijoules to Megajoules Converter — cJ to MJ
Convert Centijoule (cJ) to Megajoule (MJ) using the exact conversion factor (1 centijoule = 1e-8 megajoule). See the formula, worked examples, and conversion table.
Centijoules to Megajoules 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.
Megajoule is 1000000 joule units.
Result = input x 0.01 / 1e+6.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Centijoules to Megajoules
Centijoule and Megajoule 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 megajoule is 1000000 joule units.
Formula
megajoules = centijoules × 1e-8
This factor comes from each unit's defined relationship to the category's base unit: 1 centijoule equals 0.01 base units, and 1 megajoule equals 1000000 base units, so dividing one by the other gives the direct centijoule-to-megajoule factor of 1e-8.
Simple example
1 cJ × 1e-8 = 1e-8 MJ
1 centijoule = 1e-8 megajoules.
Real-world example
100 cJ × 1e-8 = 0.000001 MJ
100 centijoules = 0.000001 megajoules.
Conversion table
| Centijoule (cJ) | Megajoule (MJ) |
|---|---|
| 1 cJ | 1e-8 MJ |
| 10 cJ | 1e-7 MJ |
| 100 cJ | 0.000001 MJ |
| 500 cJ | 0.000005 MJ |
| 1,000 cJ | 0.00001 MJ |
| 2,000 cJ | 0.00002 MJ |
Reverse conversion: Megajoule to Centijoule
1e-8 MJ × 100000000 = 1 cJ
1e-8 megajoules = 1 centijoule.
centijoules = megajoules × 100000000
For a page dedicated to this direction, see Megajoule to Centijoule.
Understanding the Centijoule (cJ)
Centijoule is 0.01 joule units.
Understanding the Megajoule (MJ)
Megajoule is 1000000 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many megajoules are in 1 centijoule?
1 centijoule equals 1e-8 megajoules, using the exact defined conversion factor rather than an estimate.
How do I convert centijoule to megajoule?
Multiply the centijoule value by 1e-8. The converter above does this instantly to whatever precision you set.
How do I convert megajoule back to centijoule?
Use the reverse factor: 1 megajoule equals 100,000,000 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 megajoule?
Megajoule (MJ) is a unit of energy.
Is the centijoule to megajoule conversion exact?
Yes. Both centijoule and megajoule are defined by fixed standards rather than physical artifacts, so the factor of 1e-8 used above is exact to as many digits as you choose to display.