is the heat level of a material, measured in Kelvin (K) or degrees Celsius (°C). K is the SI unit of measure. The Kelvin scale begins at absolute zero, which corresponds to –273.15 °C. Conversion between k and °C:
K = °C + 273.15
°C = K – 273.15
Temperature differences are expressed in Kelvin, although they can also be specified in degrees Celsius.
In some countries, Fahrenheit is still commonly used as a unit. In this case, the conversion is as follows:
°C = (°F-32) x 5/9
°F = °C x 9/5 + 32