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Delisle to Rømer calculator

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How to use it?

To use the calculator, place your cursor in the desired unit field and write a number.The calculator will automatically convert your number and display the result in the other unit fields. If needed use the dot "." as the decimal separator.

Rounding: 
°De
°Rø

Delisle to Rømer formula

°Rø\ =\ 60 - °De \times \frac{7}{20}

Rømer to Delisle formula

°De\ =\ (60 - °Rø) \times \frac{20}{7}

Delisle
Delisle

The Delisle scale (°D) is a temperature scale invented in 1732 by the French astronomer Joseph-Nicolas Delisle (1688–1768). In 1732, Delisle 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. Delisle thermometers usually had 2400 or 2700 gradations, appropriate to the winter in St. Petersburg, as he had been invited by Peter the Great to St. Petersburg to found an observatory in 1725.

Source: Wikipedia

Rømer
Rømer

The Rømer scale is a temperature scale named after the Danish astronomer Ole Christensen Rømer, who proposed it in 1701. It is based on the freezing point of pure water being 7.5 degrees and the boiling point of water as 60 degrees. In this scale, the zero was initially set using freezing brine. The boiling point of water was defined as 60 degrees. Rømer then saw that the freezing point of pure water was roughly one eighth of the way (about 7.5 degrees) between these two points, so he redefined the lower fixed point to be the freezing point of water at precisely 7.5 degrees. This did not greatly change the scale but made it easier to calibrate by defining it by reference to pure water.

Source: Wikipedia


Delisle to Rømer Conversion Table

Below you can generate and download as CSV, Excel, PDF or print the Delisle to Rømer conversion table based on your needs.

Selected rounding: none (You can change it above in the dropdown)

From:
To:
Increment:
°De °Rø °De °Rø °De °Rø °De °Rø
1 59.65 26 50.9 51 42.15 76 33.4
2 59.3 27 50.55 52 41.8 77 33.05
3 58.95 28 50.2 53 41.45 78 32.7
4 58.6 29 49.85 54 41.1 79 32.35
5 58.25 30 49.5 55 40.75 80 32
6 57.9 31 49.15 56 40.4 81 31.65
7 57.55 32 48.8 57 40.05 82 31.3
8 57.2 33 48.45 58 39.7 83 30.95
9 56.85 34 48.1 59 39.35 84 30.6
10 56.5 35 47.75 60 39 85 30.25
11 56.15 36 47.4 61 38.65 86 29.9
12 55.8 37 47.05 62 38.3 87 29.55
13 55.45 38 46.7 63 37.95 88 29.2
14 55.1 39 46.35 64 37.6 89 28.85
15 54.75 40 46 65 37.25 90 28.5
16 54.4 41 45.65 66 36.9 91 28.15
17 54.05 42 45.3 67 36.55 92 27.8
18 53.7 43 44.95 68 36.2 93 27.45
19 53.35 44 44.6 69 35.85 94 27.1
20 53 45 44.25 70 35.5 95 26.75
21 52.65 46 43.9 71 35.15 96 26.4
22 52.3 47 43.55 72 34.8 97 26.05
23 51.95 48 43.2 73 34.45 98 25.7
24 51.6 49 42.85 74 34.1 99 25.35
25 51.25 50 42.5 75 33.75 100 25

  • °De
    Delisle (99.33 °C)
    The Delisle scale (°D) is a temperature scale invented in 1732 by the French astronomer Joseph-Nicolas Delisle (1688–1768). 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).
  • °Rø
    Rømer (-12.38 °C)
    The Rømer scale (Danish pronunciation: [ˈʁœːˀmɐ]; also Roemer) is a temperature scale named after the Danish astronomer Ole Christensen Rømer, who proposed it in 1701. It is based on the freezing point of pure water being 7.5 degrees and the boiling point of water as 60 degrees.
Tags Delisle to Rømer °De to °Rø Delisle °De Rømer °Rø converter calculator conversion table

Temperature

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