What is the temperature conversion from Celsius to Kelvin?

The correct method to convert temperature from Celsius to Kelvin is to add 273.15 to the Celsius temperature. This is based on the relationship between the Celsius and Kelvin scales, which are both metric temperature scales but start from different points; 0 degrees Celsius is equivalent to 273.15 Kelvin.

Kelvin is an absolute temperature scale where 0 K is the absolute zero point, the theoretical point where molecular motion stops, while Celsius is a relative scale based on the freezing and boiling points of water. To find the Kelvin temperature, you simply adjust the Celsius temperature by adding the constant 273.15, thereby providing the correct conversion necessary for scientific calculations and equations that require absolute temperature values.

The other options do not represent the correct relationship between Celsius and Kelvin. Subtracting from Celsius or using multiplication and addition incorrectly applies temperature conversion principles. Thus, adding 273.15 is the accurate and scientifically accepted method for this conversion.