Joule per Gram (J/g)
Joules per gram are used in calorimetry and DSC results (enthalpy of melting, crystallinity); the number equals kJ/kg.
Symbol: J/g
Quantity: specific energy: enthalpy, latent heat and heating value per mass
SI relation: 1 J/g = 1000 J/kg (exact)
Derivation: 1 J/g = 1 kJ/kg.
Exact: yes, by definition
Same quantity as kilojoule per kilogram (kJ/kg) : the factor between them is exactly 1.
Typical uses
- DSC melting and crystallisation enthalpy
- Chemistry calorimetry
Convert joules per gram to other units
| Conversion | 1 J/g equals | Reverse |
|---|---|---|
| joule per gram to kilojoule per kilogram | 1 kJ/kg | kilojoule per kilogram to joule per gram |
| joule per gram to megajoule per kilogram | 0.001 MJ/kg | megajoule per kilogram to joule per gram |
| joule per gram to BTU per pound | 0.4299226139 BTU/lb | BTU per pound to joule per gram |
| joule per gram to kilocalorie per kilogram | 0.2388458966 kcal/kg | kilocalorie per kilogram to joule per gram |
| joule per gram to joule per kilogram | 1000 J/kg | joule per kilogram to joule per gram |
| joule per gram to calorie per gram | 0.2388458966 cal/g | calorie per gram to joule per gram |
| joule per gram to kilowatt-hour per kilogram | 0.0002777777778 kWh/kg | kilowatt-hour per kilogram to joule per gram |
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). Joule per Gram (J/g). Retrieved October 29, 2026, from https://scientificconverters.com/units/joule-per-gram/
IEEE
Scientific Converters, "Joule per Gram (J/g)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/joule-per-gram/