Common Scales: | ||

Fahrenheit: | °F | |

Celsius: | °C - Centigrade | |

Absolute Scales: | ||

Kelvin: | °K - Increments are the same as °C | |

Rankine: | °R - Increments are the same as °F | |

Other Scales: | ||

Rømer: | °Rø | |

Réaumur: | °Ré | |

Delisle: | °D | |

Newton: | °N | |

Electronvolt: | °eV |

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Decimal Places:

Scale & Temperature Information | |
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Fahrenheit Celsius / Centigrade Kelvin Rankine Absolute Zero Freezing Point of Water Rømer Réaumur Delisle Newton Electron Volt |
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Absolute zero is the temperature where molecules cease to move.

It is the lowest temperature possible and Absolute Zero equals 0° Kelvin = -273.15° Centigrade/Celsius, and 0° Rankin = -459.67° Fahrenheit.

Fahrenheit's zero degree mark is the freezing point of brine made of ammonium chloride salt.

Its scale is aproximatly 4 degrees for each degree in the Rømer scale and adjusted slightly to eliminate fractions at the freezing point and boiling point of water.

The Fahrenheit Scale was established in

The melting point of a substance is the temperature at which the substance changes state from solid to liquid. It is equal to freezing point (the temperature at which a substance changes state from liquid to solid). The melting point of ice (freezing point of water) at the normal pressure 1 atm (101.325 kPa) is 0 centigrade = 32°F. Many of the temperature scales use this temperature as one of their reference points

The Rømer scale was originally based on having a zero degree mark at the freezing point of brine made of ammonium chloride salt with a spread of 60 degrees from the freezing point of the brine to the boiling point of pure water. It was then adjusted slightly so that the freezing point of pure water was at exactly 7.5 degrees and the boiling point at 60 degrees.

The Rømer scale was proposed in

Centigrade is from the Latin "centum" translated as 100 and "gradus" translated as "steps". It is based on two temperature points with zero being at the melting point of water and 100 at the boiling point of water, and has 100 evenly graduated intervals between these two points.

Known as centigrade from

The Réaumur temperature scale is based the freezing and boiling points of water set to 0 and 80 degrees respectively. The scale is named after René Antoine Ferchault de Réaumur, who first proposed it in

The Delisle thermometers generally had 2400 graduations, appropriate to winters in St. Petersburg. In

The Newton scale was devised by Isaac Newton around

The Electron Volt scale, based on the Kelvin scale, where 1 eV = 11,605 degrees Kelvin. It is defined as the total amount of kinetic energy gained by an unbound electron as it is accelerated through a potential difference of one volt.

Electronvolts is used in the field of plasma physics which deals with phenomena of an electromagnetic nature that involve very high temperatures, and is customary to express these temperatures in electronvolts (eV) or kiloelectronvolts (keV), where 1 eV = 11,605 K.

Kelvin follows the Centigrade scale increments and is adjusted so that its zero point is at absolute zero which is defined as -273.15 degrees Centigrade.

Named after Lord Kelvin (William Thomson), and associated to his paper written in

Rankine uses the Fahrenheit scale and is adjusted so that its zero point is at absolute zero which is defined as -459.67 degrees Fahrenheit.

Named after William John Macquorn Rankine, who proposed the scale in