Kilojoules per Kilogram to Joules per Gram (kJ/kg to J/g)
1 kilojoule per kilogram (kJ/kg) = 1 joule per gram (J/g). 1 J/g = 1 kJ/kg. Example: 15 kJ/kg = 15 × 1 = 15 J/g.
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1 kJ/kg = 1 J/g
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilojoule per kilogram to joule per gram converter to paste a column from Excel.
How to Convert Kilojoule per Kilogram to Joule per Gram
- 1 kJ/kg = 1 J/g
- 1 J/g = 1 kJ/kg
- Example: convert 15 kJ/kg to J/g: 15 kJ/kg = 15 × 1 J/g = 15 J/g
Formula
J/g = kJ/kg × 1
Derivation from SI units:
- 1 kJ/kg = 1000 J/kg.
- 1 J/g = 1 kJ/kg.
- 1 kJ/kg = 1000 J/kg ÷ 1000 J/kg per J/g = 1 J/g
Both units are defined exactly, so the factor is exact. Kilojoule per Kilogram definition: kilojoule per kilogram; Joule per Gram definition: joule per gram.
Worked examples
- A reading of 334 kJ/kg converts to 334 J/g.
334 kJ/kg × 1 = 334 J/g - A value of 2257 kJ/kg is 2257 J/g.
2257 kJ/kg × 1 = 2257 J/g
Kilojoule per Kilogram to Joule per Gram conversion table
| Kilojoules per Kilogram (kJ/kg) | Joules per Gram (J/g) |
|---|---|
| 1 kJ/kg | 1 J/g |
| 10 kJ/kg | 10 J/g |
| 100 kJ/kg | 100 J/g |
| 334 kJ/kg | 334 J/g |
| 419 kJ/kg | 419 J/g |
| 1000 kJ/kg | 1000 J/g |
| 2257 kJ/kg | 2257 J/g |
| 2676 kJ/kg | 2676 J/g |
| 3000 kJ/kg | 3000 J/g |
| 3500 kJ/kg | 3500 J/g |
Where it's used
Kilojoules per Kilogram are used for steam tables (h, u, latent heat), 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.
Kilojoule per Kilogram to other specific energy units
| Conversion | 1 kJ/kg equals |
|---|---|
| kilojoule per kilogram to joule per gram | 1 J/g |
| kilojoule per kilogram to megajoule per kilogram | 0.001 MJ/kg |
| kilojoule per kilogram to BTU per pound | 0.4299226139 BTU/lb |
| kilojoule per kilogram to kilocalorie per kilogram | 0.2388458966 kcal/kg |
| kilojoule per kilogram to joule per kilogram | 1000 J/kg |
| kilojoule per kilogram to calorie per gram | 0.2388458966 cal/g |
| kilojoule per kilogram to kilowatt-hour per kilogram | 0.0002777777778 kWh/kg |
Frequently asked questions
How many joules per gram are in 1 kilojoule per kilogram?
1 kJ/kg = 1 J/g.
How do I convert kilojoules per kilogram to joules per gram?
Multiply the value in kJ/kg by 1. For example, 15 kJ/kg × 1 = 15 J/g.
Is the kJ/kg to J/g conversion exact?
Yes. Both units are defined exactly, and 1 kJ/kg is exactly 1 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). Kilojoules per Kilogram to Joules per Gram (kJ/kg to J/g). Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/kilojoules-per-kilogram-to-joules-per-gram/
IEEE
Scientific Converters, "Kilojoules per Kilogram to Joules per Gram (kJ/kg to J/g)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/kilojoules-per-kilogram-to-joules-per-gram/