Rankine to Réaumur (°R → °Ré)
Formula
°R → kelvin → °RéConversion Table
| °R | °Ré |
|---|---|
| 0 | -218.52 |
| 1.0000 | -218.08 |
| 2.0000 | -217.63 |
| 3.0000 | -217.19 |
| 4.0000 | -216.74 |
| 5.0000 | -216.30 |
| 6.0000 | -215.85 |
| 7.0000 | -215.41 |
| 8.0000 | -214.96 |
| 9.0000 | -214.52 |
| 10.000 | -214.08 |
| 11.000 | -213.63 |
| 12.000 | -213.19 |
| 13.000 | -212.74 |
| 14.000 | -212.30 |
| 15.000 | -211.85 |
| 16.000 | -211.41 |
| 17.000 | -210.96 |
| 18.000 | -210.52 |
| 19.000 | -210.08 |
| °R | °Ré |
|---|---|
| 20.000 | -209.63 |
| 21.000 | -209.19 |
| 22.000 | -208.74 |
| 23.000 | -208.30 |
| 24.000 | -207.85 |
| 25.000 | -207.41 |
| 26.000 | -206.96 |
| 27.000 | -206.52 |
| 28.000 | -206.08 |
| 29.000 | -205.63 |
| 30.000 | -205.19 |
| 31.000 | -204.74 |
| 32.000 | -204.30 |
| 33.000 | -203.85 |
| 34.000 | -203.41 |
| 35.000 | -202.96 |
| 36.000 | -202.52 |
| 37.000 | -202.08 |
| 38.000 | -201.63 |
| 39.000 | -201.19 |
| °R | °Ré |
|---|---|
| 40.000 | -200.74 |
| 41.000 | -200.30 |
| 42.000 | -199.85 |
| 43.000 | -199.41 |
| 44.000 | -198.96 |
| 45.000 | -198.52 |
| 46.000 | -198.08 |
| 47.000 | -197.63 |
| 48.000 | -197.19 |
| 49.000 | -196.74 |
| 50.000 | -196.30 |
| 51.000 | -195.85 |
| 52.000 | -195.41 |
| 53.000 | -194.96 |
| 54.000 | -194.52 |
| 55.000 | -194.08 |
| 56.000 | -193.63 |
| 57.000 | -193.19 |
| 58.000 | -192.74 |
| 59.000 | -192.30 |
| °R | °Ré |
|---|---|
| 60.000 | -191.85 |
| 61.000 | -191.41 |
| 62.000 | -190.96 |
| 63.000 | -190.52 |
| 64.000 | -190.08 |
| 65.000 | -189.63 |
| 66.000 | -189.19 |
| 67.000 | -188.74 |
| 68.000 | -188.30 |
| 69.000 | -187.85 |
| 70.000 | -187.41 |
| 71.000 | -186.96 |
| 72.000 | -186.52 |
| 73.000 | -186.08 |
| 74.000 | -185.63 |
| 75.000 | -185.19 |
| 76.000 | -184.74 |
| 77.000 | -184.30 |
| 78.000 | -183.85 |
| 79.000 | -183.41 |
Rankine to Réaumur Conversion
Converting Rankine (°R) to Réaumur (°Ré) is a common temperature conversion. 1 °R equals -218.075556 °Ré. For example, 100 °R is equal to -174.075556 °Ré.
Quick Mental Math: Rankine to Réaumur
Divide by 2.25 to convert rankine to reaumur.
Why is converting Rankine to Réaumur tricky?
The conversion factor requires careful attention to avoid reversing the operation.
Reference Temperatures
Absolute zero: 0 °R = -218.52 °Ré. Water freezing point: 491.67 °R = 0 °Ré. Room temperature: 527.67 °R = 16 °Ré. Body temperature: 558.27 °R = 29.6 °Ré. Water boiling point: 671.67 °R = 80 °Ré.
What is Rankine?
Rankine (°R) is a unit of temperature. The Rankine scale is an absolute temperature scale used in engineering, defined as degrees Fahrenheit offset from absolute zero. One degree Rankine equals exactly 5/9 kelvin, with 0 °R at absolute zero (-459.67 °F). It is used primarily in thermodynamics and aerospace engineering in the United States [nist-sp-811]. The Rankine scale was proposed by William John Macquorn Rankine in 1859 to align the Fahrenheit scale with absolute zero. It was adopted to facilitate thermodynamic calculations using Fahrenheit-based units, especially in steam engine and aerospace contexts [nist-sp-811]. Rankine is mainly used in the US aerospace and engineering industries where Fahrenheit is standard. It is recognized by the NIST and used alongside Kelvin for absolute temperature measurements. The scale is uncommon outside specialized fields and the US [nist-sp-811].
What is Réaumur?
Réaumur (°Ré) is a unit of temperature. The Réaumur scale is a temperature scale where water freezes at 0 °Ré and boils at 80 °Ré at standard atmospheric pressure. Each degree Réaumur corresponds to 1.25 degrees Celsius. The scale was historically used in Europe but is now mostly obsolete and replaced by Celsius and Kelvin [cgpm-resolutions]. René Antoine Ferchault de Réaumur introduced the scale in 1730 to simplify temperature measurement using alcohol thermometers. It was widely used in France and parts of Europe until the 19th century before being supplanted by the Celsius scale [cgpm-resolutions]. Today, the Réaumur scale has limited use and appears mainly in historical or academic contexts. Some traditional cheese-making regions in Europe may still reference it. Modern science and industry prefer Celsius or Kelvin in line with SI standards [cgpm-resolutions].
Common Misspellings
People often search for this conversion using these alternate spellings: rankin, rankinee, rankinne, rankin temperature, reaumer, reaumur, reaumur scale, réamer. All of these refer to the Rankine to Réaumur conversion.