Convert Joules per Kilogram to Joules per Gram (J/kg to J/g)
1 joule per kilogram (J/kg) = 0.001 joules per gram (J/g). 1 J/g = 1000 J/kg. Example: 15 J/kg = 15 × 0.001 = 0.015 J/g.
Also searched as joules per kilogram to J/g, joules per kilogram in J/g, joules per kilogram into joules per gram, J/kg to J/g, J/kg in joules per gram, J/kg into joule per gram, joule per kilogram to joule per gram, J/kg to joules per gram converter and how many joules per gram in a joule per kilogram.
1 J/kg = 0.001 J/g
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk joule per kilogram to joule per gram converter to paste a column from Excel.
How to Convert Joule per Kilogram to Joule per Gram
- 1 J/kg = 0.001 J/g
- 1 J/g = 1000 J/kg
- Example: convert 15 J/kg to J/g: 15 J/kg = 15 × 0.001 J/g = 0.015 J/g
Formula
J/g = J/kg ÷ 1000
Derivation from SI units:
- Energy per unit mass: J/kg (also m²/s²).
- 1 J/g = 1 kJ/kg.
Both units are defined exactly, so the factor is exact. Joule per Kilogram definition: joule per kilogram; Joule per Gram definition: joule per gram.
Worked examples
- A reading of 334000 J/kg converts to 334 J/g.
334000 J/kg × 0.001 = 334 J/g - A value of 2500000 J/kg is 2500 J/g.
2500000 J/kg × 0.001 = 2500 J/g
Joule per Kilogram to Joule per Gram conversion table
| Joules per Kilogram (J/kg) | Joules per Gram (J/g) |
|---|---|
| 1000 J/kg | 1 J/g |
| 10000 J/kg | 10 J/g |
| 100000 J/kg | 100 J/g |
| 334000 J/kg | 334 J/g |
| 1000000 J/kg | 1000 J/g |
| 2257000 J/kg | 2257 J/g |
| 2500000 J/kg | 2500 J/g |
| 10000000 J/kg | 10000 J/g |
| 42000000 J/kg | 42000 J/g |
| 50000000 J/kg | 50000 J/g |
Where it's used
Joules per Kilogram are used for specific enthalpy h and internal energy u, while joules per gram appear in DSC melting and crystallisation enthalpy. Both measure specific energy: enthalpy, latent heat and heating value per mass, so the conversion is a fixed factor.
Joule per Kilogram to other specific energy units
| Conversion | 1 J/kg equals |
|---|---|
| joule per kilogram to joule per gram | 0.001 J/g |
| joule per kilogram to kilojoule per kilogram | 0.001 kJ/kg |
| joule per kilogram to megajoule per kilogram | 0.000001 MJ/kg |
| joule per kilogram to BTU per pound | 0.0004299226139 BTU/lb |
| joule per kilogram to kilocalorie per kilogram | 0.0002388458966 kcal/kg |
| joule per kilogram to calorie per gram | 0.0002388458966 cal/g |
| joule per kilogram to kilowatt-hour per kilogram | 2.777777778 × 10⁻⁷ kWh/kg |
Frequently asked questions
How many joules per gram are in 1 joule per kilogram?
1 J/kg = 0.001 J/g.
How do I convert joules per kilogram to joules per gram?
Multiply the value in J/kg by 0.001, or divide it by 1000. For example, 15 J/kg × 0.001 = 0.015 J/g.
Is the J/kg to J/g conversion exact?
Yes. Both units are defined exactly, and 1 J/kg is exactly 0.001 J/g.
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 Joules per Kilogram to Joules per Gram (J/kg to J/g). Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/joules-per-kilogram-to-joules-per-gram/
IEEE
Scientific Converters, "Convert Joules per Kilogram to Joules per Gram (J/kg to J/g)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/joules-per-kilogram-to-joules-per-gram/