Convert Kilocalories per Kilogram to Megajoules per Kilogram
1 kilocalorie per kilogram (kcal/kg) = 0.0041868 megajoules per kilogram (MJ/kg). 1 MJ/kg = 238.8458966 kcal/kg. Example: 6000 kcal/kg = 6000 × 0.0041868 = 25.1208 MJ/kg.
Also searched as kcal/kg to MJ/kg, GCV kcal to MJ and calorific value conversion.
1 kcal/kg = 0.0041868 MJ/kg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilocalorie per kilogram to megajoule per kilogram converter to paste a column from Excel.
How to Convert Kilocalorie per Kilogram to Megajoule per Kilogram
- 1 kcal/kg = 0.0041868 MJ/kg
- 1 MJ/kg = 238.8458966 kcal/kg
- Example: convert 6000 kcal/kg to MJ/kg: 6000 kcal/kg = 6000 × 0.0041868 MJ/kg = 25.1208 MJ/kg
Reference conditions. kcal/kg: International Table calorie (4.1868 J).
Formula
MJ/kg = kcal/kg × 0.0041868
or MJ/kg = kcal/kg ÷ 238.8458966275
Derivation from SI units:
- 1 kcal_IT/kg = 4186.8 J/kg.
- 1 MJ/kg = 10⁶ J/kg.
- 1 kcal/kg = 4186.8 J/kg ÷ 1000000 J/kg per MJ/kg = 0.0041868 MJ/kg
Both units are defined exactly, so the factor is exact. Kilocalorie per Kilogram definition: kilocalorie per kilogram; Megajoule per Kilogram definition: megajoule per kilogram.
Worked examples
- An imported coal of 6000 kcal/kg is 25.1208 MJ/kg.
6000 kcal/kg × 0.0041868 = 25.1208 MJ/kg - A low-grade coal of 4000 kcal/kg is 16.7472 MJ/kg.
4000 kcal/kg × 0.0041868 = 16.7472 MJ/kg
Kilocalorie per Kilogram to Megajoule per Kilogram conversion table
| Kilocalories per Kilogram (kcal/kg) | Megajoules per Kilogram (MJ/kg) |
|---|---|
| 1 kcal/kg | 0.0041868 MJ/kg |
| 10 kcal/kg | 0.041868 MJ/kg |
| 80 kcal/kg | 0.334944 MJ/kg |
| 100 kcal/kg | 0.41868 MJ/kg |
| 540 kcal/kg | 2.260872 MJ/kg |
| 1000 kcal/kg | 4.1868 MJ/kg |
| 3500 kcal/kg | 14.6538 MJ/kg |
| 4500 kcal/kg | 18.8406 MJ/kg |
| 6000 kcal/kg | 25.1208 MJ/kg |
| 10500 kcal/kg | 43.9614 MJ/kg |
Where it's used
Coal GCVs in kcal/kg are converted to MJ/kg for international fuel comparisons. Multiply by 0.0041868.
Kilocalorie per Kilogram to other specific energy units
| Conversion | 1 kcal/kg equals |
|---|---|
| kilocalorie per kilogram to megajoule per kilogram | 0.0041868 MJ/kg |
| kilocalorie per kilogram to kilojoule per kilogram | 4.1868 kJ/kg |
| kilocalorie per kilogram to BTU per pound | 1.8 BTU/lb |
| kilocalorie per kilogram to joule per kilogram | 4186.8 J/kg |
| kilocalorie per kilogram to calorie per gram | 1 cal/g |
| kilocalorie per kilogram to kilowatt-hour per kilogram | 0.001163 kWh/kg |
| kilocalorie per kilogram to joule per gram | 4.1868 J/g |
Frequently asked questions
What is 6000 kcal/kg in MJ/kg?
25.1208 MJ/kg.
How many megajoules per kilogram are in 1 kilocalorie per kilogram?
1 kcal/kg = 0.0041868 MJ/kg.
How do I convert kilocalories per kilogram to megajoules per kilogram?
Multiply the value in kcal/kg by 0.0041868, or divide it by 238.8458966. For example, 6000 kcal/kg × 0.0041868 = 25.1208 MJ/kg.
Is the kcal/kg to MJ/kg conversion exact?
Yes. Both units are defined exactly, and 1 kcal/kg 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 Kilocalories per Kilogram to Megajoules per Kilogram. Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/kilocalories-per-kilogram-to-megajoules-per-kilogram/
IEEE
Scientific Converters, "Convert Kilocalories per Kilogram to Megajoules per Kilogram," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/kilocalories-per-kilogram-to-megajoules-per-kilogram/