The Fahrenheit temperature scale (developed in 1724 by Daniel Gabriel Fahrenheit) was established using three reference points of temperature: a frigorific mixture of ice, water, and ammonium chloride, for 0°; an equilibrium mixture of ice and water, for 32°; and the average human body temperature, initially 96° (approximately).

At one standard atmosphere of pressure, water melts/freezes at 32 °F and vaporizes/condenses at 212 °F.

Fahrenheit is related to the Kelvin scale by the following formulas:

(^\circ F+459.67)\frac{5}{9}=K

^\circ F=K\frac{9}{5}-459.67

Fahrenheit is related to the Celsius scale by the following formulas:

(^\circ F-32)\frac{5}{9}=^\circ C

^\circ F=^\circ C\frac{9}{5}+32

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