›› Convert degree Celsius to degree Delisle


degree Celsius
Delisle

›› More information from the unit converter

How many degree Celsius in 1 Delisle? The answer is -0.66666666666667.
We assume you are converting between degree Celsius and degree Delisle.
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degree Celsius or Delisle
The SI base unit for temperature is the kelvin.
1 kelvin is equal to 1 degree Celsius, or -1.5 Delisle.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between degrees Celsius and degrees Delisle.
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›› Common temperature conversions

degree Celsius to Reaumur
degree Celsius to Fahrenheit
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degree Celsius to newton
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›› Definition: Celsius

The degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701–1744), who first proposed a similar system in 1742. The Celsius temperature scale was designed so that the freezing point of water is 0 degrees, and the boiling point is 100 degrees at standard atmospheric pressure.


›› Definition: Delisle

The Delisle scale is a temperature scale invented in 1732 by the French astronomer Joseph-Nicolas Delisle (1688–1768). It is similar to that of Réaumur. Delisle was the author of Mémoires pour servir à l'histoire et aux progrès de l'Astronomie, de la Géographie et de la Physique (1738).

He had been invited to Russia by Peter the Great. In 1732 he built a thermometer that used mercury as a working fluid. Delisle chose his scale using the temperature of boiling water as the fixed zero point and measured the contraction of the mercury (with lower temperatures) in hundred-thousandths. The Celsius scale too originally ran from zero for boiling water down to 100 for freezing water. This was reversed to its modern order some time after his death, in part at the instigation of Daniel Ekström, the manufacturer of most of the thermometers used by Celsius.

The Delisle thermometers usually had 2400 graduations, appropriate to the winter in St. Petersburg. In 1738 Josias Weitbrecht (1702–1747) recalibrated the Delisle thermometer with 0 degrees as the boiling point and 150 degrees as the freezing point of water. The Delisle thermometer remained in use for almost 100 years in Russia.

Thus, the unit of this scale, the Delisle degree (sometimes spelled de Lisle), is -2/3 of a kelvin (or a degree Celsius) and absolute zero is at 559.725 Delisle degrees.


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