Réaumur to Celsius

Bookmark Page Celsius to Réaumur (Swap Units)


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Convert Réaumur to Celsius

℃ =
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More information: Celsius


The Réaumur scale also known as the "octogesimal division", is a temperature scale in which the freezing and boiling points of water are set to 0 and 80 degrees respectively. The scale is named after René Antoine Ferchault de Réaumur, who first proposed something similar in 1730.


Convert Réaumur to Celsius

℃ =


Although initially defined by the freezing point of water (and later the melting point of ice), the Celsius scale is now officially a derived scale, defined in relation to the Kelvin temperature scale.

Zero on the Celsius scale (0℃) is now defined as the equivalent to 273.15K, with a temperature difference of 1 deg C equivalent to a difference of 1K, meaning the unit size in each scale is the same. This means that 100℃, previously defined as the boiling point of water, is now defined as the equivalent to 373.15K.

The Celsius scale is an interval system but not a ratio system, meaning it follows a relative scale but not an absolute scale. This can be seen because the temperature interval between 20℃ and 30℃ is the same as between 30℃ and 40℃, but 40℃ does not have twice the air heat energy of 20℃.

A temperature difference of 1 deg C is the equivalent of a temperature difference 1.8°F.


Réaumur to Celsius table
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Réaumur Celsius
0ºRé 0.00
1ºRé 1.25
2ºRé 2.50
3ºRé 3.75
4ºRé 5.00
5ºRé 6.25
6ºRé 7.50
7ºRé 8.75
8ºRé 10.00
9ºRé 11.25
10ºRé 12.50
11ºRé 13.75
12ºRé 15.00
13ºRé 16.25
14ºRé 17.50
15ºRé 18.75
16ºRé 20.00
17ºRé 21.25
18ºRé 22.50
19ºRé 23.75
Réaumur Celsius
20ºRé 25.00
21ºRé 26.25
22ºRé 27.50
23ºRé 28.75
24ºRé 30.00
25ºRé 31.25
26ºRé 32.50
27ºRé 33.75
28ºRé 35.00
29ºRé 36.25
30ºRé 37.50
31ºRé 38.75
32ºRé 40.00
33ºRé 41.25
34ºRé 42.50
35ºRé 43.75
36ºRé 45.00
37ºRé 46.25
38ºRé 47.50
39ºRé 48.75
Réaumur Celsius
40ºRé 50.00
41ºRé 51.25
42ºRé 52.50
43ºRé 53.75
44ºRé 55.00
45ºRé 56.25
46ºRé 57.50
47ºRé 58.75
48ºRé 60.00
49ºRé 61.25
50ºRé 62.50
51ºRé 63.75
52ºRé 65.00
53ºRé 66.25
54ºRé 67.50
55ºRé 68.75
56ºRé 70.00
57ºRé 71.25
58ºRé 72.50
59ºRé 73.75
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