Kelvin (K), base unit of thermodynamic temperature measurement in the International System of Units.
While the celsius is a unit of temperature on temperature scale originally known as the centigrade scale.
0 K is also known as absolute zero. It is the point at which no further heat can be removed from a system because there is no molecular movement, so there is no lower temperature possible.
Similarly, this means the lowest possible Celsius temperature you can ever get is minus 273.15
Formula to convert K to °C.
To convert K to °C , we subtract 273.15 from the K.
Temp. in Celsius = Temp. in Kelvin – 273.15
Convert 546.3 K to Celsius.
= 300.15 -273.15
= 27 °C .