Megajoule per Kilogram (MJ/kg)
Megajoules per kilogram express the heating (calorific) value of fuels: diesel about 45 MJ/kg, coal 20–30 MJ/kg, biomass 15–19 MJ/kg and hydrogen 120 MJ/kg (lower heating values).
Symbol: MJ/kg
Quantity: specific energy: enthalpy, latent heat and heating value per mass
SI relation: 1 MJ/kg = 1000000 J/kg (exact)
Derivation: 1 MJ/kg = 10⁶ J/kg.
Exact: yes, by definition
Typical uses
- Fuel calorific values (GCV, NCV)
- Engine and boiler efficiency
- Biomass and biofuel energy
Convert megajoules per kilogram to other units
| Conversion | 1 MJ/kg equals | Reverse |
|---|---|---|
| megajoule per kilogram to kilojoule per kilogram | 1000 kJ/kg | kilojoule per kilogram to megajoule per kilogram |
| megajoule per kilogram to BTU per pound | 429.9226139 BTU/lb | BTU per pound to megajoule per kilogram |
| megajoule per kilogram to kilocalorie per kilogram | 238.8458966 kcal/kg | kilocalorie per kilogram to megajoule per kilogram |
| megajoule per kilogram to joule per kilogram | 1000000 J/kg | joule per kilogram to megajoule per kilogram |
| megajoule per kilogram to calorie per gram | 238.8458966 cal/g | calorie per gram to megajoule per kilogram |
| megajoule per kilogram to kilowatt-hour per kilogram | 0.2777777778 kWh/kg | kilowatt-hour per kilogram to megajoule per kilogram |
| megajoule per kilogram to joule per gram | 1000 J/g | joule per gram to megajoule per kilogram |
Open the Specific Enthalpy Converter (kJ/kg, BTU/lb, kcal/kg) to convert any value between all units.
Sources
- 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). Megajoule per Kilogram (MJ/kg). Retrieved October 29, 2026, from https://scientificconverters.com/units/megajoule-per-kilogram/
IEEE
Scientific Converters, "Megajoule per Kilogram (MJ/kg)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/megajoule-per-kilogram/