Convert Kilojoules per Kilogram Kelvin to BTU per Pound °F
1 kilojoule per kilogram kelvin (kJ/(kg·K)) = 0.2388458966 BTU per pound degree Fahrenheit (BTU/(lb·°F)). 1 BTU/(lb·°F) = 4.1868 kJ/(kg·K). Example: 4.18 kJ/(kg·K) = 4.18 × 0.2388458966 = 0.9983758479 BTU/(lb·°F).
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1 kJ/(kg·K) = 0.2388458966 BTU/(lb·°F)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilojoule per kilogram kelvin to BTU per pound degree Fahrenheit converter to paste a column from Excel.
How to Convert Kilojoule per Kilogram Kelvin to BTU per Pound °F
- 1 kJ/(kg·K) = 0.2388458966 BTU/(lb·°F)
- 1 BTU/(lb·°F) = 4.1868 kJ/(kg·K)
- Example: convert 4.18 kJ/(kg·K) to BTU/(lb·°F): 4.18 kJ/(kg·K) = 4.18 × 0.2388458966 BTU/(lb·°F) = 0.9983758479 BTU/(lb·°F)
Formula
BTU/(lb·°F) = kJ/(kg·K) × 0.2388458966275
or BTU/(lb·°F) = kJ/(kg·K) ÷ 4.1868
Derivation from SI units:
- 1 kJ/(kg·K) = 1000 J/(kg·K).
- 1 BTU_IT/(lb·°F) = 4186.8 J/(kg·K) exactly (the BTU and the calorie scale the same way).
- 1 kJ/(kg·K) = 1000 J/(kg·K) ÷ 4186.8 J/(kg·K) per BTU/(lb·°F) = 0.2388458966275 BTU/(lb·°F)
Both units are defined exactly, so the factor is exact. Kilojoule per Kilogram Kelvin definition: kilojoule per kilogram kelvin; BTU per Pound °F definition: BTU per pound degree Fahrenheit.
Worked examples
- Water at 4.18 kJ/(kg·K) is 0.9983758479 BTU/(lb·°F).
4.18 kJ/(kg·K) × 0.2388458966 = 0.9983758479 BTU/(lb·°F) - Aluminium at 0.9 kJ/(kg·K) is 0.214961307 BTU/(lb·°F).
0.9 kJ/(kg·K) × 0.2388458966 = 0.214961307 BTU/(lb·°F)
Kilojoule per Kilogram Kelvin to BTU per Pound °F conversion table
| Kilojoules per Kilogram Kelvin (kJ/(kg·K)) | BTU per Pound °F (BTU/(lb·°F)) |
|---|---|
| 0.385 kJ/(kg·K) | 0.0919556702 BTU/(lb·°F) |
| 0.45 kJ/(kg·K) | 0.1074806535 BTU/(lb·°F) |
| 0.5 kJ/(kg·K) | 0.1194229483 BTU/(lb·°F) |
| 0.84 kJ/(kg·K) | 0.2006305532 BTU/(lb·°F) |
| 0.9 kJ/(kg·K) | 0.214961307 BTU/(lb·°F) |
| 1.005 kJ/(kg·K) | 0.2400401261 BTU/(lb·°F) |
| 1.7 kJ/(kg·K) | 0.4060380243 BTU/(lb·°F) |
| 2 kJ/(kg·K) | 0.4776917933 BTU/(lb·°F) |
| 4.18 kJ/(kg·K) | 0.9983758479 BTU/(lb·°F) |
| 4.186 kJ/(kg·K) | 0.9998089233 BTU/(lb·°F) |
Where it's used
Specific heats in kJ/(kg·K) from SI tables are converted to BTU/(lb·°F) for US-unit calculations. Divide by 4.1868.
Kilojoule per Kilogram Kelvin to other specific heat capacity units
| Conversion | 1 kJ/(kg·K) equals |
|---|---|
| kilojoule per kilogram kelvin to BTU per pound degree Fahrenheit | 0.2388458966 BTU/(lb·°F) |
| kilojoule per kilogram kelvin to joule per kilogram kelvin | 1000 J/(kg·K) |
| kilojoule per kilogram kelvin to calorie per gram degree Celsius | 0.2388458966 cal/(g·°C) |
| kilojoule per kilogram kelvin to joule per gram kelvin | 1 J/(g·K) |
| kilojoule per kilogram kelvin to kilocalorie per kilogram degree Celsius | 0.2388458966 kcal/(kg·°C) |
Frequently asked questions
How many BTU/(lb·°F) is 1 kJ/(kg·K)?
1 kJ/(kg·K) = 0.2388458966 BTU/(lb·°F).
How many BTU per pound degree Fahrenheit are in 1 kilojoule per kilogram kelvin?
1 kJ/(kg·K) = 0.2388458966 BTU/(lb·°F).
How do I convert kilojoules per kilogram kelvin to BTU per pound degree Fahrenheit?
Multiply the value in kJ/(kg·K) by 0.2388458966, or divide it by 4.1868. For example, 4.18 kJ/(kg·K) × 0.2388458966 = 0.9983758479 BTU/(lb·°F).
Is the kJ/(kg·K) to BTU/(lb·°F) conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "British thermal unit_IT per pound degree Fahrenheit".
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 Kelvin to BTU per Pound °F. Retrieved October 29, 2026, from https://scientificconverters.com/specific-heat/kilojoules-per-kilogram-kelvin-to-btu-per-pound-fahrenheit/
IEEE
Scientific Converters, "Convert Kilojoules per Kilogram Kelvin to BTU per Pound °F," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-heat/kilojoules-per-kilogram-kelvin-to-btu-per-pound-fahrenheit/