What Is Fahrenheit (°F)?
Definition
Fahrenheit (°F): The temperature scale used in the United States, symbol °F. It is linked to Celsius by t(°F) = 1.8 × t(°C) + 32, so one Fahrenheit degree is 5/9 of a Celsius degree.
Fahrenheit (°F) is the temperature scale used in the United States for weather, body temperature and oven settings. To convert Celsius to Fahrenheit, multiply by 1.8 and add 32. On this scale water freezes at about 32 °F and boils at about 212 °F. Absolute zero is −459.67 °F, and at −40 degrees the two scales read the same.
Where it appears in the formulas
t(°F) = 1.8 × t(°C) + 32 and t(°C) = (t(°F) − 32) × 5/9. The temperature converter takes this relation from NIST SP 811. For example, an oven at 350 °F is about 176.67 °C, and 0 °F is about −17.78 °C.