Convert Kilojoules per Kilogram to Joules per Kilogram
1 kilojoule per kilogram (kJ/kg) = 1000 joules per kilogram (J/kg). 1 J/kg = 0.001 kJ/kg. Example: 15 kJ/kg = 15 × 1000 = 15000 J/kg.
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1 kJ/kg = 1000 J/kg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilojoule per kilogram to joule per kilogram converter to paste a column from Excel.
How to Convert Kilojoule per Kilogram to Joule per Kilogram
- 1 kJ/kg = 1000 J/kg
- 1 J/kg = 0.001 kJ/kg
- Example: convert 15 kJ/kg to J/kg: 15 kJ/kg = 15 × 1000 J/kg = 15000 J/kg
Formula
J/kg = kJ/kg × 1000
Derivation from SI units:
- 1 kJ/kg = 1000 J/kg.
- Energy per unit mass: J/kg (also m²/s²).
Both units are defined exactly, so the factor is exact. Kilojoule per Kilogram definition: kilojoule per kilogram; Joule per Kilogram definition: joule per kilogram.
Worked examples
- A reading of 334 kJ/kg converts to 334000 J/kg.
334 kJ/kg × 1000 = 334000 J/kg - A value of 2257 kJ/kg is 2257000 J/kg.
2257 kJ/kg × 1000 = 2257000 J/kg
Kilojoule per Kilogram to Joule per Kilogram conversion table
| Kilojoules per Kilogram (kJ/kg) | Joules per Kilogram (J/kg) |
|---|---|
| 1 kJ/kg | 1000 J/kg |
| 10 kJ/kg | 10000 J/kg |
| 100 kJ/kg | 100000 J/kg |
| 334 kJ/kg | 334000 J/kg |
| 419 kJ/kg | 419000 J/kg |
| 1000 kJ/kg | 1000000 J/kg |
| 2257 kJ/kg | 2257000 J/kg |
| 2676 kJ/kg | 2676000 J/kg |
| 3000 kJ/kg | 3000000 J/kg |
| 3500 kJ/kg | 3500000 J/kg |
Where it's used
Kilojoules per Kilogram are used for steam tables (h, u, latent heat), while joules per kilogram appear in specific enthalpy h and internal energy u. 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 kilogram | 1000 J/kg |
| 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 calorie per gram | 0.2388458966 cal/g |
| kilojoule per kilogram to kilowatt-hour per kilogram | 0.0002777777778 kWh/kg |
| kilojoule per kilogram to joule per gram | 1 J/g |
Frequently asked questions
How many joules per kilogram are in 1 kilojoule per kilogram?
1 kJ/kg = 1000 J/kg.
How do I convert kilojoules per kilogram to joules per kilogram?
Multiply the value in kJ/kg by 1000. For example, 15 kJ/kg × 1000 = 15000 J/kg.
Is the kJ/kg to J/kg conversion exact?
Yes. Both units are defined exactly, and 1 kJ/kg is exactly 1000 J/kg.
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 Kilojoules per Kilogram to Joules per Kilogram. Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/kilojoules-per-kilogram-to-joules-per-kilogram/
IEEE
Scientific Converters, "Convert Kilojoules per Kilogram to Joules per Kilogram," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/kilojoules-per-kilogram-to-joules-per-kilogram/