The zero point on the Kelvin scale is called "absolute zero." It is the point at which no more heat energy can be extracted from a system, and all molecular motion stops. Absolute zero is equivalent to 0 Kelvins (K). To convert a temperature from Celsius to Kelvin, you need to add 273.15 to the Celsius temperature. For example, to convert -273.15 degrees Celsius to Kelvin, you add 273.15, resulting in 0 Kelvin, which is absolute zero.
