BTU/(lb·°F) is a unit of specific heat capacity commonly used in the United States. It tells how many British thermal units are required to raise the temperature of one pound of material by one degree Fahrenheit.
Understanding kilojoule per kilogram‑Kelvin
kJ/(kg·K) is the SI unit for specific heat capacity. It represents the energy in kilojoules needed to raise one kilogram of a substance by one kelvin (or one degree Celsius).
Why convert?
Engineers working on international projects often need to translate data between the imperial and metric systems. Converting specific‑heat values ensures accurate thermal‑analysis, equipment sizing, and energy‑balance calculations.
Heat‑exchanger design
Thermal‑storage calculations
Process‑simulation software inputs
The conversion factor is exact: \\\(1\\,\\text{BTU/(lb·°F)} = 4.1868\\,\\text{kJ/(kg·K)}\\\).
BTU per pound-Fahrenheit to Kilojoule per kilogram-Kelvin Conversion Reference Table
BTU per pound-Fahrenheit (BTU/(lb·°F))
Kilojoule per kilogram-Kelvin (kJ/(kg·K))
0.1
0.4187
0.5
2.0934
1.0
4.1868
2.0
8.3736
5.0
20.934
10.0
41.868
20.0
83.736
50.0
209.34
100.0
418.68
500.0
2093.4
1000.0
4186.8
Step‑by‑step conversion example
Convert \\\(10\\,\\text{BTU/(lb·°F)}\\\) to kJ/(kg·K).
BTU/(lb·°F) is a specific‑heat capacity unit. It quantifies the amount of heat (in British Thermal Units) needed to raise the temperature of one pound of a material by one degree Fahrenheit.
The factor 4.1868 is a pure unit‑conversion constant; it does not depend on the material. It converts the imperial specific‑heat unit to the SI unit with exact numerical equivalence.
"On fait la science avec des faits, comme on fait une maison avec des pierres ; mais une accumulation de faits n'est pas plus une science qu'un tas de pierres n'est une maison." "Science is built up of facts, as a house is built of stones; but an accumulation of facts is no more a science than a heap of stones is a house." — Henri Poincaré (French Mathematician, Theoretical Physicist & Mining Engineer)