Convert Joules per Kilogram to Kilocalories per Kilogram
1 joule per kilogram (J/kg) = 0.0002388458966 kilocalories per kilogram (kcal/kg). 1 kcal/kg = 4186.8 J/kg. Example: 15 J/kg = 15 × 0.0002388458966 = 0.003582688449 kcal/kg.
Also searched as joules per kilogram to kcal/kg, joules per kilogram in kcal/kg, joules per kilogram into kilocalories per kilogram, J/kg to kcal/kg, J/kg in kilocalories per kilogram, J/kg into kilocalorie per kilogram, joule per kilogram to kilocalorie per kilogram, J/kg to kilocalories per kilogram converter and how many kilocalories per kilogram in a joule per kilogram.
1 J/kg = 0.0002388458966 kcal/kg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk joule per kilogram to kilocalorie per kilogram converter to paste a column from Excel.
How to Convert Joule per Kilogram to Kilocalorie per Kilogram
- 1 J/kg = 0.0002388458966 kcal/kg
- 1 kcal/kg = 4186.8 J/kg
- Example: convert 15 J/kg to kcal/kg: 15 J/kg = 15 × 0.0002388458966 kcal/kg = 0.003582688449 kcal/kg
Reference conditions. kcal/kg: International Table calorie (4.1868 J).
Formula
kcal/kg = J/kg × 0.0002388458966275
or kcal/kg = J/kg ÷ 4186.8
Derivation from SI units:
- Energy per unit mass: J/kg (also m²/s²).
- 1 kcal_IT/kg = 4186.8 J/kg.
Both units are defined exactly, so the factor is exact. Joule per Kilogram definition: joule per kilogram; Kilocalorie per Kilogram definition: kilocalorie per kilogram.
Worked examples
- A reading of 334000 J/kg converts to 79.77452947 kcal/kg.
334000 J/kg × 0.0002388458966 = 79.77452947 kcal/kg - A value of 2500000 J/kg is 597.1147416 kcal/kg.
2500000 J/kg × 0.0002388458966 = 597.1147416 kcal/kg
Joule per Kilogram to Kilocalorie per Kilogram conversion table
| Joules per Kilogram (J/kg) | Kilocalories per Kilogram (kcal/kg) |
|---|---|
| 1000 J/kg | 0.2388458966 kcal/kg |
| 10000 J/kg | 2.388458966 kcal/kg |
| 100000 J/kg | 23.88458966 kcal/kg |
| 334000 J/kg | 79.77452947 kcal/kg |
| 1000000 J/kg | 238.8458966 kcal/kg |
| 2257000 J/kg | 539.0751887 kcal/kg |
| 2500000 J/kg | 597.1147416 kcal/kg |
| 10000000 J/kg | 2388.458966 kcal/kg |
| 42000000 J/kg | 10031.52766 kcal/kg |
| 50000000 J/kg | 11942.29483 kcal/kg |
Where it's used
Joules per Kilogram are used for specific enthalpy h and internal energy u, while kilocalories per kilogram appear in indian coal grading (GCV in kcal/kg). Both measure specific energy: enthalpy, latent heat and heating value per mass, so the conversion is a fixed factor.
Joule per Kilogram to other specific energy units
| Conversion | 1 J/kg equals |
|---|---|
| joule per kilogram to kilocalorie per kilogram | 0.0002388458966 kcal/kg |
| joule per kilogram to kilojoule per kilogram | 0.001 kJ/kg |
| joule per kilogram to megajoule per kilogram | 0.000001 MJ/kg |
| joule per kilogram to BTU per pound | 0.0004299226139 BTU/lb |
| joule per kilogram to calorie per gram | 0.0002388458966 cal/g |
| joule per kilogram to kilowatt-hour per kilogram | 2.777777778 × 10⁻⁷ kWh/kg |
| joule per kilogram to joule per gram | 0.001 J/g |
Frequently asked questions
How many kilocalories per kilogram are in 1 joule per kilogram?
1 J/kg = 0.0002388458966 kcal/kg.
How do I convert joules per kilogram to kilocalories per kilogram?
Multiply the value in J/kg by 0.0002388458966, or divide it by 4186.8. For example, 15 J/kg × 0.0002388458966 = 0.003582688449 kcal/kg.
Is the J/kg to kcal/kg conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
- 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".
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 Joules per Kilogram to Kilocalories per Kilogram. Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/joules-per-kilogram-to-kilocalories-per-kilogram/
IEEE
Scientific Converters, "Convert Joules per Kilogram to Kilocalories per Kilogram," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/joules-per-kilogram-to-kilocalories-per-kilogram/