- a scale of temperature in which the freezing and boiling points of water are 32º and 212º. To convert Fahrenheit temperatures to Celsius, subtract 32, multiply by 5 and divide by 9; so 68ºF equals 20ºC. As a quick rough estimate, subtract 30 and divide by two.
Origin & History of “Fahrenheit”
The ‘pre-metrication’ temperature scale takes its name from
its inventor, the German physicist Gabriel Daniel Fahrenheit (16861736). Not only
did he develop
of a scale in which
ice melts at 32º and water boils at 212º, he also
invented the mercury thermometer