Fahrenheit is a scale for measuring temperature, usually abbreviated as F. The freezing point of water is 32° F, and boiling point of water is 212° F. The normal oral temperature is 97.3° to 98.8° F. The rectal temperature is about 1 F higher than the oral temperature. To convert Fahrenheit to Celsius, one can use the formula: (degrees in F - 32) multiplied by 5/9.