The degree Celsius is an SI unit derived from the kelvin. https://www.bipm.org/en/publications/si-brochure/table3.html https://www.bipm.org/en/publications/si-

The degree Celsius is an SI unit derived from the kelvin. https://www.bipm.org/en/publications/si-brochure/table3.html https://www.bipm.org/en/publications/si-brochure/table3.html