Fahrenheit and Kelvin Convertor ( °F & °K )

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The Fahrenheit scale is a temperature scale based on one proposed in 1724 by Dutch–German–Polish physicist Daniel Gabriel Fahrenheit (1686–1736).
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, water and salt (ammonium chloride).
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.
At the end of the 2010s, 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, the Cayman Islands and Liberia.
Antigua and Barbuda and other islands which use the same meteorological service, such as Anguilla, the British Virgin Islands, Montserrat and Saint Kitts and Nevis, as well as Bermuda, Belize and the Turks and Caicos Islands, use Fahrenheit and Celsius. All other countries in the world officially now use the Celsius scale, named after Swedish astronomer Anders Celsius.


The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.
The kelvin (symbol: K) is the base unit of temperature in the International System of Units (SI).
Until 2018, the kelvin was defined as the fraction ​1⁄273.16 of the thermodynamic temperature of the triple point of water (exactly 0.01 °C or 32.018 °F).
In other words, it is defined such that the triple point of water is exactly 273.16 K.
On 16 November 2018, a new definition was adopted, in terms of a fixed value of the Boltzmann constant.
For legal metrology purposes, the new definition will officially come into force 20 May 2019 (the 130th anniversary of the Metre Convention).
The Kelvin scale is named after the Belfast-born, Glasgow University engineer and physicist William Thomson, 1st Baron Kelvin (1824–1907), who wrote of the need for an "absolute thermometric scale".
Unlike the degree Fahrenheit and degree Celsius, the kelvin is not referred to or written as a degree.
The kelvin is the primary unit of temperature measurement in the physical sciences, but is often used in conjunction with the degree Celsius, which has the same magnitude.
The definition implies that absolute zero (0 K) is equivalent to −273.15 °C (−459.67 °F).

By the way, to convert between Fahrenheit and Kelvin, you can use this application. So if you need it, download and use this application by now.
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What's New

Kelvin to Fahrenheit (F° - K) - Fahrenheit to Kelvin (K - F°)
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Additional Information

January 4, 2019
Current Version
Requires Android
4.2 and up
Content Rating
Offered By
Mehdi Raeisi
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