Table Of Contents
Calories to megajoule Conversion
1 calories (cal) is equal to 0.000004184 megajoule (MJ).
1 cal = 0.000004184 MJ
or
1 MJ = 239005.7361 cal
Formula
To convert a energy from calories (cal) to megajoule (MJ), divide the energy in calories by 239005.7361
e(MJ) = e(cal) / 239005.7361
Examples:
Convert 100 calories to megajoule:
e(MJ) = 100cal / 239005.7361 = 0.0004184 MJ
Conversion table
| Calories (cal) | Megajoule (MJ) |
|---|---|
| 1 cal | 4.184e-6 MJ |
| 2 cal | 8.368e-6 MJ |
| 3 cal | 1.2552e-5 MJ |
| 5 cal | 2.092e-5 MJ |
| 10 cal | 4.184e-5 MJ |
| 20 cal | 8.368e-5 MJ |
| 25 cal | 1.046e-4 MJ |
| 50 cal | 2.092e-4 MJ |
| 100 cal | 4.184e-4 MJ |
| 250 cal | 0.001046 MJ |
| 500 cal | 0.002092 MJ |
| 1000 cal | 0.004184 MJ |
| Megajoule (MJ) | Calories (cal) |
|---|---|
| 1 MJ | 239005.736137667 cal |
| 2 MJ | 478011.472275335 cal |
| 3 MJ | 717017.208413002 cal |
| 5 MJ | 1195028.680688337 cal |
| 10 MJ | 2390057.361376673 cal |
| 20 MJ | 4780114.722753346 cal |
| 25 MJ | 5975143.403441682 cal |
| 50 MJ | 1.1950286806883365e7 cal |
| 100 MJ | 2.390057361376673e7 cal |
| 250 MJ | 5.9751434034416825e7 cal |
| 500 MJ | 1.1950286806883365e8 cal |
| 1000 MJ | 2.390057361376673e8 cal |
Frequently asked questions
How do I convert calories to megajoule?
Divide the value in calories by 239005.7361 to get the result in megajoule. For example, 5 cal ÷ 239005.7361 = 2.092e-5 MJ.
How many megajoule are in 1 calories?
1 calories (cal) is equal to 4.184e-6 megajoule (MJ).
How do I convert megajoule back to calories?
Use the inverse operation: multiply the value in megajoule by 239005.7361 to get the result in calories.
How accurate is the calories to megajoule conversion?
The converter multiplies by the conversion factor 239005.7361 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically (NIST SP 811, 2008 edition)
- NIST Guide to the SI (SP 811), Footnotes (notes 22 and 23)
- CODATA Value: electron volt-joule relationship (NIST Fundamental Physical Constants)