J/(kg⋅K)\text{J/(kg}{\cdot}\text{K)}

joule per kilogram-kelvin

Specific heat capacityexact by definition

The joule per kilogram-kelvin is the SI unit of specific heat capacity: the energy needed to raise one kilogram of a substance by one kelvin. As the coherent SI combination it needs no conversion and its factor of 1 is exact. The kelvin in the denominator is a temperature interval, so a value in J/(kg·K) may be used with a rise in Celsius degrees without any conversion.

Watch out: Specific heat depends on whether the substance is held at constant pressure or constant volume. For solids and liquids the two are nearly equal and the distinction is usually ignored, but for gases c_p and c_v differ substantially: for dry air, about 1005 versus 718 J/(kg·K).

1 J/(kg⋅K)\text{J/(kg}{\cdot}\text{K)} 1 J/(kg⋅K)\text{J/(kg}{\cdot}\text{K)}

One joule per kilogram-kelvin in every specific heat capacity unit

1joule per kilogram-kelvin (J/(kg·K))this unit
1joule per kilogram-Celsius (J/(kg·°C))
0.185863foot pound-force per pound-Rankine (ft·lbf/(lb·°R))
0.001kilojoule per kilogram-kelvin (kJ/(kg·K))
0.001kilojoule per kilogram-Celsius (kJ/(kg·°C))
0.001joule per gram-kelvin (J/(g·K))
0.000239006calorie per gram-Celsius (cal/(g·°C))
0.000239006kilocalorie per kilogram-Celsius (kcal/(kg·°C))
0.000238846BTU per pound-Fahrenheit (BTU/(lb·°F))
0.000238846BTU per pound-Rankine (BTU/(lb·°R))
Convert joule per kilogram-kelvin to
jkgk → btulbf

All specific heat capacity units →