Convert Joules per Gram Kelvin to BTU per Pound °F
1 joule per gram kelvin (J/(g·K)) = 0.2388458966 BTU per pound degree Fahrenheit (BTU/(lb·°F)). 1 BTU/(lb·°F) = 4.1868 J/(g·K). Example: 15 J/(g·K) = 15 × 0.2388458966 = 3.582688449 BTU/(lb·°F).
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1 J/(g·K) = 0.2388458966 BTU/(lb·°F)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk joule per gram kelvin to BTU per pound degree Fahrenheit converter to paste a column from Excel.
How to Convert Joule per Gram Kelvin to BTU per Pound °F
- 1 J/(g·K) = 0.2388458966 BTU/(lb·°F)
- 1 BTU/(lb·°F) = 4.1868 J/(g·K)
- Example: convert 15 J/(g·K) to BTU/(lb·°F): 15 J/(g·K) = 15 × 0.2388458966 BTU/(lb·°F) = 3.582688449 BTU/(lb·°F)
Formula
BTU/(lb·°F) = J/(g·K) × 0.2388458966275
or BTU/(lb·°F) = J/(g·K) ÷ 4.1868
Derivation from SI units:
- 1 J/(g·K) = 1000 J/(kg·K) = 1 kJ/(kg·K).
- 1 BTU_IT/(lb·°F) = 4186.8 J/(kg·K) exactly (the BTU and the calorie scale the same way).
- 1 J/(g·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. Joule per Gram Kelvin definition: joule per gram kelvin; BTU per Pound °F definition: BTU per pound degree Fahrenheit.
Worked examples
- A reading of 0.45 J/(g·K) converts to 0.1074806535 BTU/(lb·°F).
0.45 J/(g·K) × 0.2388458966 = 0.1074806535 BTU/(lb·°F) - A value of 1.7 J/(g·K) is 0.4060380243 BTU/(lb·°F).
1.7 J/(g·K) × 0.2388458966 = 0.4060380243 BTU/(lb·°F)
Joule per Gram Kelvin to BTU per Pound °F conversion table
| Joules per Gram Kelvin (J/(g·K)) | BTU per Pound °F (BTU/(lb·°F)) |
|---|---|
| 0.13 J/(g·K) | 0.03104996656 BTU/(lb·°F) |
| 0.24 J/(g·K) | 0.05732301519 BTU/(lb·°F) |
| 0.385 J/(g·K) | 0.0919556702 BTU/(lb·°F) |
| 0.45 J/(g·K) | 0.1074806535 BTU/(lb·°F) |
| 0.9 J/(g·K) | 0.214961307 BTU/(lb·°F) |
| 1 J/(g·K) | 0.2388458966 BTU/(lb·°F) |
| 1.7 J/(g·K) | 0.4060380243 BTU/(lb·°F) |
| 2 J/(g·K) | 0.4776917933 BTU/(lb·°F) |
| 2.4 J/(g·K) | 0.5732301519 BTU/(lb·°F) |
| 4.18 J/(g·K) | 0.9983758479 BTU/(lb·°F) |
Where it's used
Joules per Gram Kelvin are used for calorimetry in chemistry, while BTU per pound degree Fahrenheit appear in US HVAC and process design. Both measure specific heat capacity, so the conversion is a fixed factor.
Joule per Gram Kelvin to other specific heat capacity units
| Conversion | 1 J/(g·K) equals |
|---|---|
| joule per gram kelvin to BTU per pound degree Fahrenheit | 0.2388458966 BTU/(lb·°F) |
| joule per gram kelvin to joule per kilogram kelvin | 1000 J/(kg·K) |
| joule per gram kelvin to kilojoule per kilogram kelvin | 1 kJ/(kg·K) |
| joule per gram kelvin to calorie per gram degree Celsius | 0.2388458966 cal/(g·°C) |
| joule per gram kelvin to kilocalorie per kilogram degree Celsius | 0.2388458966 kcal/(kg·°C) |
Frequently asked questions
How many BTU per pound degree Fahrenheit are in 1 joule per gram kelvin?
1 J/(g·K) = 0.2388458966 BTU/(lb·°F).
How do I convert joules per gram kelvin to BTU per pound degree Fahrenheit?
Multiply the value in J/(g·K) by 0.2388458966, or divide it by 4.1868. For example, 15 J/(g·K) × 0.2388458966 = 3.582688449 BTU/(lb·°F).
Is the J/(g·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 Joules per Gram Kelvin to BTU per Pound °F. Retrieved October 29, 2026, from https://scientificconverters.com/specific-heat/joules-per-gram-kelvin-to-btu-per-pound-fahrenheit/
IEEE
Scientific Converters, "Convert Joules per Gram Kelvin to BTU per Pound °F," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-heat/joules-per-gram-kelvin-to-btu-per-pound-fahrenheit/