Convert Megajoules per Kilogram to kWh/kg
1 megajoule per kilogram (MJ/kg) = 0.2777777778 kilowatt-hours per kilogram (kWh/kg). 1 kWh/kg = 3.6 MJ/kg. Example: 15 MJ/kg = 15 × 0.2777777778 = 4.166666667 kWh/kg.
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1 MJ/kg = 0.2777777778 kWh/kg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk megajoule per kilogram to kilowatt-hour per kilogram converter to paste a column from Excel.
How to Convert Megajoule per Kilogram to Kilowatt-hour per Kilogram
- 1 MJ/kg = 0.2777777778 kWh/kg
- 1 kWh/kg = 3.6 MJ/kg
- Example: convert 15 MJ/kg to kWh/kg: 15 MJ/kg = 15 × 0.2777777778 kWh/kg = 4.166666667 kWh/kg
Formula
kWh/kg = MJ/kg × 0.2777777777778
or kWh/kg = MJ/kg ÷ 3.6
Derivation from SI units:
- 1 MJ/kg = 10⁶ J/kg.
- 1 kWh/kg = 3.6 × 10⁶ J/kg.
- 1 MJ/kg = 1000000 J/kg ÷ 3600000 J/kg per kWh/kg = 0.2777777777778 kWh/kg
Both units are defined exactly, so the factor is exact. Megajoule per Kilogram definition: megajoule per kilogram; Kilowatt-hour per Kilogram definition: kilowatt-hour per kilogram.
Worked examples
- A reading of 25 MJ/kg converts to 6.944444444 kWh/kg.
25 MJ/kg × 0.2777777778 = 6.944444444 kWh/kg - A value of 44 MJ/kg is 12.22222222 kWh/kg.
44 MJ/kg × 0.2777777778 = 12.22222222 kWh/kg
Megajoule per Kilogram to Kilowatt-hour per Kilogram conversion table
| Megajoules per Kilogram (MJ/kg) | Kilowatt-hours per Kilogram (kWh/kg) |
|---|---|
| 10 MJ/kg | 2.777777778 kWh/kg |
| 15 MJ/kg | 4.166666667 kWh/kg |
| 17 MJ/kg | 4.722222222 kWh/kg |
| 25 MJ/kg | 6.944444444 kWh/kg |
| 30 MJ/kg | 8.333333333 kWh/kg |
| 42 MJ/kg | 11.66666667 kWh/kg |
| 44 MJ/kg | 12.22222222 kWh/kg |
| 46 MJ/kg | 12.77777778 kWh/kg |
| 50 MJ/kg | 13.88888889 kWh/kg |
| 120 MJ/kg | 33.33333333 kWh/kg |
Where it's used
Megajoules per Kilogram are used for fuel calorific values (GCV, NCV), while kilowatt-hours per kilogram appear in battery gravimetric energy density. Both measure specific energy: enthalpy, latent heat and heating value per mass, so the conversion is a fixed factor.
Megajoule per Kilogram to other specific energy units
| Conversion | 1 MJ/kg equals |
|---|---|
| megajoule per kilogram to kilowatt-hour per kilogram | 0.2777777778 kWh/kg |
| megajoule per kilogram to kilojoule per kilogram | 1000 kJ/kg |
| megajoule per kilogram to BTU per pound | 429.9226139 BTU/lb |
| megajoule per kilogram to kilocalorie per kilogram | 238.8458966 kcal/kg |
| megajoule per kilogram to joule per kilogram | 1000000 J/kg |
| megajoule per kilogram to calorie per gram | 238.8458966 cal/g |
| megajoule per kilogram to joule per gram | 1000 J/g |
Frequently asked questions
How many kilowatt-hours per kilogram are in 1 megajoule per kilogram?
1 MJ/kg = 0.2777777778 kWh/kg.
How do I convert megajoules per kilogram to kilowatt-hours per kilogram?
Multiply the value in MJ/kg by 0.2777777778, or divide it by 3.6. For example, 15 MJ/kg × 0.2777777778 = 4.166666667 kWh/kg.
Is the MJ/kg to kWh/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).
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 Megajoules per Kilogram to kWh/kg. Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/megajoules-per-kilogram-to-kilowatt-hours-per-kilogram/
IEEE
Scientific Converters, "Convert Megajoules per Kilogram to kWh/kg," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/megajoules-per-kilogram-to-kilowatt-hours-per-kilogram/