Rankine to Rømer (°R → °Rø)
Formula
°R → kelvin → °RøConversion Table
| °R | °Rø |
|---|---|
| 0 | -135.90 |
| 1.0000 | -135.61 |
| 2.0000 | -135.32 |
| 3.0000 | -135.03 |
| 4.0000 | -134.74 |
| 5.0000 | -134.45 |
| 6.0000 | -134.15 |
| 7.0000 | -133.86 |
| 8.0000 | -133.57 |
| 9.0000 | -133.28 |
| 10.000 | -132.99 |
| 11.000 | -132.70 |
| 12.000 | -132.40 |
| 13.000 | -132.11 |
| 14.000 | -131.82 |
| 15.000 | -131.53 |
| 16.000 | -131.24 |
| 17.000 | -130.95 |
| 18.000 | -130.65 |
| 19.000 | -130.36 |
| °R | °Rø |
|---|---|
| 20.000 | -130.07 |
| 21.000 | -129.78 |
| 22.000 | -129.49 |
| 23.000 | -129.20 |
| 24.000 | -128.90 |
| 25.000 | -128.61 |
| 26.000 | -128.32 |
| 27.000 | -128.03 |
| 28.000 | -127.74 |
| 29.000 | -127.45 |
| 30.000 | -127.15 |
| 31.000 | -126.86 |
| 32.000 | -126.57 |
| 33.000 | -126.28 |
| 34.000 | -125.99 |
| 35.000 | -125.70 |
| 36.000 | -125.40 |
| 37.000 | -125.11 |
| 38.000 | -124.82 |
| 39.000 | -124.53 |
| °R | °Rø |
|---|---|
| 40.000 | -124.24 |
| 41.000 | -123.95 |
| 42.000 | -123.65 |
| 43.000 | -123.36 |
| 44.000 | -123.07 |
| 45.000 | -122.78 |
| 46.000 | -122.49 |
| 47.000 | -122.20 |
| 48.000 | -121.90 |
| 49.000 | -121.61 |
| 50.000 | -121.32 |
| 51.000 | -121.03 |
| 52.000 | -120.74 |
| 53.000 | -120.45 |
| 54.000 | -120.15 |
| 55.000 | -119.86 |
| 56.000 | -119.57 |
| 57.000 | -119.28 |
| 58.000 | -118.99 |
| 59.000 | -118.70 |
| °R | °Rø |
|---|---|
| 60.000 | -118.40 |
| 61.000 | -118.11 |
| 62.000 | -117.82 |
| 63.000 | -117.53 |
| 64.000 | -117.24 |
| 65.000 | -116.95 |
| 66.000 | -116.65 |
| 67.000 | -116.36 |
| 68.000 | -116.07 |
| 69.000 | -115.78 |
| 70.000 | -115.49 |
| 71.000 | -115.20 |
| 72.000 | -114.90 |
| 73.000 | -114.61 |
| 74.000 | -114.32 |
| 75.000 | -114.03 |
| 76.000 | -113.74 |
| 77.000 | -113.45 |
| 78.000 | -113.15 |
| 79.000 | -112.86 |
Rankine to Rømer Conversion
Converting Rankine (°R) to Rømer (°Rø) is a common temperature conversion. 1 °R equals -135.612083 °Rø. For example, 100 °R is equal to -106.737083 °Rø.
Quick Mental Math: Rankine to Rømer
Divide by 3.43 to convert rankine to romer.
Why is converting Rankine to Rømer tricky?
The conversion factor requires careful attention to avoid reversing the operation.
Reference Temperatures
Absolute zero: 0 °R = -135.90375 °Rø. Water freezing point: 491.67 °R = 7.5 °Rø. Room temperature: 527.67 °R = 18 °Rø. Body temperature: 558.27 °R = 26.925 °Rø. Water boiling point: 671.67 °R = 60 °Rø.
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 Rømer?
Rømer (°Rø) is a unit of temperature. The Rømer scale is an early temperature scale where water freezes at 7.5 °Rø and boils at 60 °Rø. It was devised to improve temperature measurement accuracy using mercury thermometers. One degree Rømer equals approximately 1.25 degrees Celsius [cgpm-resolutions]. Ole Christensen Rømer introduced this scale in 1701 to standardize temperature readings using mercury thermometers. It influenced later scales such as Celsius and Fahrenheit, representing an important step in temperature measurement history [cgpm-resolutions]. The Rømer scale is obsolete and used only for historical study. It has no current application in science or industry but remains significant in the chronology of temperature scale development [cgpm-resolutions].
Common Misspellings
People often search for this conversion using these alternate spellings: rankin, rankinee, rankinne, rankin temperature, romer scale, roemer, romer temperature, römer. All of these refer to the Rankine to Rømer conversion.