Convert Calories per Gram to Megajoules per Kilogram
1 calorie per gram (cal/g) = 0.0041868 megajoules per kilogram (MJ/kg). 1 MJ/kg = 238.8458966 cal/g. Example: 15 cal/g = 15 × 0.0041868 = 0.062802 MJ/kg.
Also searched as calories per gram to MJ/kg, calories per gram in MJ/kg, calories per gram into megajoules per kilogram, cal/g to MJ/kg, cal/g in megajoules per kilogram, cal/g into megajoule per kilogram, calorie per gram to megajoule per kilogram, cal/g to megajoules per kilogram converter and how many megajoules per kilogram in a calorie per gram.
1 cal/g = 0.0041868 MJ/kg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk calorie per gram to megajoule per kilogram converter to paste a column from Excel.
How to Convert Calorie per Gram to Megajoule per Kilogram
- 1 cal/g = 0.0041868 MJ/kg
- 1 MJ/kg = 238.8458966 cal/g
- Example: convert 15 cal/g to MJ/kg: 15 cal/g = 15 × 0.0041868 MJ/kg = 0.062802 MJ/kg
Reference conditions. cal/g: International Table calorie (4.1868 J).
Formula
MJ/kg = cal/g × 0.0041868
or MJ/kg = cal/g ÷ 238.8458966275
Derivation from SI units:
- 1 cal_IT/g = 4186.8 J/kg = 1 kcal/kg.
- 1 MJ/kg = 10⁶ J/kg.
- 1 cal/g = 4186.8 J/kg ÷ 1000000 J/kg per MJ/kg = 0.0041868 MJ/kg
Both units are defined exactly, so the factor is exact. Calorie per Gram definition: calorie per gram; Megajoule per Kilogram definition: megajoule per kilogram.
Worked examples
- A reading of 80 cal/g converts to 0.334944 MJ/kg.
80 cal/g × 0.0041868 = 0.334944 MJ/kg - A value of 1000 cal/g is 4.1868 MJ/kg.
1000 cal/g × 0.0041868 = 4.1868 MJ/kg
Calorie per Gram to Megajoule per Kilogram conversion table
| Calories per Gram (cal/g) | Megajoules per Kilogram (MJ/kg) |
|---|---|
| 1 cal/g | 0.0041868 MJ/kg |
| 10 cal/g | 0.041868 MJ/kg |
| 50 cal/g | 0.20934 MJ/kg |
| 80 cal/g | 0.334944 MJ/kg |
| 100 cal/g | 0.41868 MJ/kg |
| 540 cal/g | 2.260872 MJ/kg |
| 1000 cal/g | 4.1868 MJ/kg |
| 4000 cal/g | 16.7472 MJ/kg |
| 9000 cal/g | 37.6812 MJ/kg |
| 11000 cal/g | 46.0548 MJ/kg |
Where it's used
Calories per Gram are used for latent heat problems in CGS units, while megajoules per kilogram appear in fuel calorific values (GCV, NCV). Both measure specific energy: enthalpy, latent heat and heating value per mass, so the conversion is a fixed factor.
Calorie per Gram to other specific energy units
| Conversion | 1 cal/g equals |
|---|---|
| calorie per gram to megajoule per kilogram | 0.0041868 MJ/kg |
| calorie per gram to kilojoule per kilogram | 4.1868 kJ/kg |
| calorie per gram to BTU per pound | 1.8 BTU/lb |
| calorie per gram to kilocalorie per kilogram | 1 kcal/kg |
| calorie per gram to joule per kilogram | 4186.8 J/kg |
| calorie per gram to kilowatt-hour per kilogram | 0.001163 kWh/kg |
| calorie per gram to joule per gram | 4.1868 J/g |
Frequently asked questions
How many megajoules per kilogram are in 1 calorie per gram?
1 cal/g = 0.0041868 MJ/kg.
How do I convert calories per gram to megajoules per kilogram?
Multiply the value in cal/g by 0.0041868, or divide it by 238.8458966. For example, 15 cal/g × 0.0041868 = 0.062802 MJ/kg.
Is the cal/g to MJ/kg conversion exact?
Yes. Both units are defined exactly, and 1 cal/g is exactly 0.0041868 MJ/kg.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "calorie_IT per gram".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Calories per Gram to Megajoules per Kilogram. Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/calories-per-gram-to-megajoules-per-kilogram/
IEEE
Scientific Converters, "Convert Calories per Gram to Megajoules per Kilogram," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/calories-per-gram-to-megajoules-per-kilogram/