How can Celsius temperatures be converted to kelvins?

To convert a temperature from the Celsius temperature scale to the Kelvin scale, you add 273.15 to the Celsius value.12

The formula is:
$$T(K)=T{(}^{\circ }\text{C})+273.15$$

This conversion is possible because the kelvin unit has the same magnitude as the Celsius degree, meaning a change of one degree Celsius is equivalent to a change of one kelvin. The Kelvin scale is an absolute temperature scale that uses absolute zero—which is −273.15 °C—as its zero point. Because absolute zero is the lowest possible temperature, all values on the Kelvin scale are non-negative.12