Fahrenheit scale

A temperature scale proposed by the glass-instrument maker and Poland-born Dutch physicist Daniel Gabriel Fahrenheit (1686-1736) in 1724, in which the freezing and boiling points of water, under normal conditions, correspond to the values 32 and 212 respectively, both expressed in degrees Fahrenheit (°F), the unit on this scale. In order to obtain the temperature in degrees Celsius [t (°C)] from its Fahrenheit equivalent [t (°F)], or vice versa, the following conversion formulas must be used: t (°C) = [t (°F) – 32] / 1.8; t (°F) = 1.8 · t (°C) + 32. The USA is one of the few countries in the world where the use of this scale remains in force.