Convert Calories per Gram to Kilojoules per Kilogram
1 calorie per gram (cal/g) = 4.1868 kilojoules per kilogram (kJ/kg). 1 kJ/kg = 0.2388458966 cal/g. Example: 15 cal/g = 15 × 4.1868 = 62.802 kJ/kg.
Also searched as calories per gram to kJ/kg, calories per gram in kJ/kg, calories per gram into kilojoules per kilogram, cal/g to kJ/kg, cal/g in kilojoules per kilogram, cal/g into kilojoule per kilogram, calorie per gram to kilojoule per kilogram, cal/g to kilojoules per kilogram converter and how many kilojoules per kilogram in a calorie per gram.
1 cal/g = 4.1868 kJ/kg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk calorie per gram to kilojoule per kilogram converter to paste a column from Excel.
How to Convert Calorie per Gram to Kilojoule per Kilogram
- 1 cal/g = 4.1868 kJ/kg
- 1 kJ/kg = 0.2388458966 cal/g
- Example: convert 15 cal/g to kJ/kg: 15 cal/g = 15 × 4.1868 kJ/kg = 62.802 kJ/kg
Reference conditions. cal/g: International Table calorie (4.1868 J).
Formula
kJ/kg = cal/g × 4.1868
Derivation from SI units:
- 1 cal_IT/g = 4186.8 J/kg = 1 kcal/kg.
- 1 kJ/kg = 1000 J/kg.
- 1 cal/g = 4186.8 J/kg ÷ 1000 J/kg per kJ/kg = 4.1868 kJ/kg
Both units are defined exactly, so the factor is exact. Calorie per Gram definition: calorie per gram; Kilojoule per Kilogram definition: kilojoule per kilogram.
Worked examples
- A reading of 80 cal/g converts to 334.944 kJ/kg.
80 cal/g × 4.1868 = 334.944 kJ/kg - A value of 1000 cal/g is 4186.8 kJ/kg.
1000 cal/g × 4.1868 = 4186.8 kJ/kg
Calorie per Gram to Kilojoule per Kilogram conversion table
| Calories per Gram (cal/g) | Kilojoules per Kilogram (kJ/kg) |
|---|---|
| 1 cal/g | 4.1868 kJ/kg |
| 10 cal/g | 41.868 kJ/kg |
| 50 cal/g | 209.34 kJ/kg |
| 80 cal/g | 334.944 kJ/kg |
| 100 cal/g | 418.68 kJ/kg |
| 540 cal/g | 2260.872 kJ/kg |
| 1000 cal/g | 4186.8 kJ/kg |
| 4000 cal/g | 16747.2 kJ/kg |
| 9000 cal/g | 37681.2 kJ/kg |
| 11000 cal/g | 46054.8 kJ/kg |
Where it's used
Calories per Gram are used for latent heat problems in CGS units, while kilojoules per kilogram appear in steam tables (h, u, latent heat). 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 kilojoule per kilogram | 4.1868 kJ/kg |
| calorie per gram to megajoule per kilogram | 0.0041868 MJ/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 kilojoules per kilogram are in 1 calorie per gram?
1 cal/g = 4.1868 kJ/kg.
How do I convert calories per gram to kilojoules per kilogram?
Multiply the value in cal/g by 4.1868. For example, 15 cal/g × 4.1868 = 62.802 kJ/kg.
Is the cal/g to kJ/kg conversion exact?
Yes. Both units are defined exactly, and 1 cal/g is exactly 4.1868 kJ/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 Kilojoules per Kilogram. Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/calories-per-gram-to-kilojoules-per-kilogram/
IEEE
Scientific Converters, "Convert Calories per Gram to Kilojoules per Kilogram," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/calories-per-gram-to-kilojoules-per-kilogram/