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The Fahrenheit scale is a temperature scale based on one proposed in 1724 by Amsterdam-based physicist Daniel Gabriel Fahrenheit (1686–1736), after whom the scale is named.[1] It uses the degree Fahrenheit (symbol: °F) as the unit. Several accounts of how he originally defined his scale exist. The lower defining point, 0 °F, was established as the temperature of a solution of brine made from equal parts of ice and salt. Further limits were established as the melting point of ice (32 °F) and his best estimate of the average human body temperature (96 °F, about 2.6 °F less than the modern value due to a later redefinition of the scale). The scale is now usually defined by two fixed points: the temperature at which water freezes into ice is defined as 32 °F, and the boiling point of water is defined to be 212 °F, a 180 °F separation, as defined at sea level and standard atmospheric pressure.

By the end of the 20th century, Fahrenheit was used as the official temperature scale only in the United States (including its unincorporated territories), its freely associated states in the Western Pacific (Palau, the Federated States of Micronesia and the Marshall Islands), the Bahamas, Belize, and the Cayman Islands. All other countries in the world now use the Celsius scale, defined since 1954 by absolute zero being −273.15 °C and the triple point of water being at 0.01 °C.

Symbol/abbreviation: °F
TEMPERATURE's base unit: kelvin (SI Unit)
In relation to the base unit (kelvin), 1 Fahrenheit = 255.927777778 kelvin.
[Conversion table] 1 Fahrenheit (°F) to all temperature units
1 °F= -17.2222222222 celsius (°C)
1 °F= 175.833333333 delisle (°De)
1 °F= 1 fahrenheit (°F)
1 °F= 255.927777778 kelvin (K)
1 °F= -5.68333333333 newton scale (°N)
1 °F= 460.67 rankine (°R)
1 °F= -13.7777777778 reaumur (°Re)
1 °F= -1.54166666667 romer (°Rø)
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