Celsius is a temperature scale where freezing point of water is 0 degrees and the boiling point is 100 degrees. Formerly known as centigrade. The abbreviation is "oC".
Kelvin is one of the few base units in the metric system and commonly used in science as the primary temperature unit. The kelvin is an absolute temperature scale, where the absolute zero (all molecular motion stops) is defined to be 0 Kelvin and it equals to -273.15 Celsius or -459.67 Fahrenheit. This is the lowest temperature possible which means there can't be negative Kelvin temperature. Technically, the term "degree" is not used with this temperature scale but rather "Kelvins". The abbreviation is "K".
The celsius to kelvin conversion formula: Kelvin = Celsius + 273.15
For example: 30 oC = 30 + 273.15 = 303.15 K
Why? It is because the absolute zero (the starting point in Kelvin where all motion stops and nothing can be colder than this) is theoretically possible at -273.15 Celsius degrees and
the decrease or increase of one Kelvin is the same as a decrease or increase of one degree Celsius.
For fahrenheit and kelvin converter, please go to fahrenheit kelvin
For other temperature unit conversions
, please go to Temperature Conversion