Kilowatt-hour per Kilogram (kWh/kg)
Kilowatt-hours per kilogram describe battery and fuel energy density and the energy needed per kilogram of product: Li-ion cells hold about 0.25 kWh/kg and hydrogen 33.3 kWh/kg (LHV).
Symbol: kWh/kg
Quantity: specific energy: enthalpy, latent heat and heating value per mass
SI relation: 1 kWh/kg = 3600000 J/kg (exact)
Derivation: 1 kWh/kg = 3.6 × 10⁶ J/kg.
Exact: yes, by definition
Typical uses
- Battery gravimetric energy density
- Specific energy consumption of processes
- Hydrogen and fuel comparisons
Convert kilowatt-hours per kilogram to other units
| Conversion | 1 kWh/kg equals | Reverse |
|---|---|---|
| kilowatt-hour per kilogram to kilojoule per kilogram | 3600 kJ/kg | kilojoule per kilogram to kilowatt-hour per kilogram |
| kilowatt-hour per kilogram to megajoule per kilogram | 3.6 MJ/kg | megajoule per kilogram to kilowatt-hour per kilogram |
| kilowatt-hour per kilogram to BTU per pound | 1547.72141 BTU/lb | BTU per pound to kilowatt-hour per kilogram |
| kilowatt-hour per kilogram to kilocalorie per kilogram | 859.8452279 kcal/kg | kilocalorie per kilogram to kilowatt-hour per kilogram |
| kilowatt-hour per kilogram to joule per kilogram | 3600000 J/kg | joule per kilogram to kilowatt-hour per kilogram |
| kilowatt-hour per kilogram to calorie per gram | 859.8452279 cal/g | calorie per gram to kilowatt-hour per kilogram |
| kilowatt-hour per kilogram to joule per gram | 3600 J/g | joule per gram to kilowatt-hour 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). Kilowatt-hour per Kilogram (kWh/kg). Retrieved October 29, 2026, from https://scientificconverters.com/units/kilowatt-hour-per-kilogram/
IEEE
Scientific Converters, "Kilowatt-hour per Kilogram (kWh/kg)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/kilowatt-hour-per-kilogram/