Centers for Disease Control and Prevention

Centigrade A thermometer scale in which the freezing point of water at sea level is 0°C and the boiling point of water at sea level is 100°C. The Centigrade scale is used in most of the world to indicate the temperature on a thermometer, but the Fahrenheit scale is still popular in the US. This anachronism requires conversion from Centigrade (°C) to Fahrenheit (°F), and vice versa. 1°C = (5/9) (°F–32). 1°F = (9/5)(°C) + 32°.