Temperature is calculated with thermometers that may be calibrated to many different temperature scales. In many of the world (apart from Belize, Myanmar, Liberia and the United States), the Celsius scale is applied for many temperature measuring purposes. All the scientific globe (these countries involved) measures temperature using the Celsius https://offensive-bund.de/maximale-nutzung-ihres-gefrierraums-die-besten-tipps-fur-eine-effiziente-lebensmittellagerung/