Kelvin to Réaumur (K → °Ré)
Formula
K → kelvin → °RéConversion Table
| K | °Ré |
|---|---|
| 0 | -218.52 |
| 1.0000 | -217.72 |
| 2.0000 | -216.92 |
| 3.0000 | -216.12 |
| 4.0000 | -215.32 |
| 5.0000 | -214.52 |
| 6.0000 | -213.72 |
| 7.0000 | -212.92 |
| 8.0000 | -212.12 |
| 9.0000 | -211.32 |
| 10.000 | -210.52 |
| 11.000 | -209.72 |
| 12.000 | -208.92 |
| 13.000 | -208.12 |
| 14.000 | -207.32 |
| 15.000 | -206.52 |
| 16.000 | -205.72 |
| 17.000 | -204.92 |
| 18.000 | -204.12 |
| 19.000 | -203.32 |
| K | °Ré |
|---|---|
| 20.000 | -202.52 |
| 21.000 | -201.72 |
| 22.000 | -200.92 |
| 23.000 | -200.12 |
| 24.000 | -199.32 |
| 25.000 | -198.52 |
| 26.000 | -197.72 |
| 27.000 | -196.92 |
| 28.000 | -196.12 |
| 29.000 | -195.32 |
| 30.000 | -194.52 |
| 31.000 | -193.72 |
| 32.000 | -192.92 |
| 33.000 | -192.12 |
| 34.000 | -191.32 |
| 35.000 | -190.52 |
| 36.000 | -189.72 |
| 37.000 | -188.92 |
| 38.000 | -188.12 |
| 39.000 | -187.32 |
| K | °Ré |
|---|---|
| 40.000 | -186.52 |
| 41.000 | -185.72 |
| 42.000 | -184.92 |
| 43.000 | -184.12 |
| 44.000 | -183.32 |
| 45.000 | -182.52 |
| 46.000 | -181.72 |
| 47.000 | -180.92 |
| 48.000 | -180.12 |
| 49.000 | -179.32 |
| 50.000 | -178.52 |
| 51.000 | -177.72 |
| 52.000 | -176.92 |
| 53.000 | -176.12 |
| 54.000 | -175.32 |
| 55.000 | -174.52 |
| 56.000 | -173.72 |
| 57.000 | -172.92 |
| 58.000 | -172.12 |
| 59.000 | -171.32 |
| K | °Ré |
|---|---|
| 60.000 | -170.52 |
| 61.000 | -169.72 |
| 62.000 | -168.92 |
| 63.000 | -168.12 |
| 64.000 | -167.32 |
| 65.000 | -166.52 |
| 66.000 | -165.72 |
| 67.000 | -164.92 |
| 68.000 | -164.12 |
| 69.000 | -163.32 |
| 70.000 | -162.52 |
| 71.000 | -161.72 |
| 72.000 | -160.92 |
| 73.000 | -160.12 |
| 74.000 | -159.32 |
| 75.000 | -158.52 |
| 76.000 | -157.72 |
| 77.000 | -156.92 |
| 78.000 | -156.12 |
| 79.000 | -155.32 |
Kelvin to Réaumur Conversion
Converting Kelvin (K) to Réaumur (°Ré) is a common temperature conversion. 1 K equals -217.72 °Ré. For example, 100 K is equal to -138.52 °Ré.
Quick Mental Math: Kelvin to Réaumur
Divide by 1.25 to convert kelvin to reaumur.
Why is converting Kelvin to Réaumur tricky?
The conversion factor requires careful attention to avoid reversing the operation.
Reference Temperatures
Absolute zero: 0 K = -218.52 °Ré. Water freezing point: 273.15 K = 0 °Ré. Room temperature: 293.15 K = 16 °Ré. Body temperature: 310.15 K = 29.6 °Ré. Water boiling point: 373.15 K = 80 °Ré.
What is Kelvin?
Kelvin (K) is a unit of temperature. Kelvin is the SI base unit of thermodynamic temperature defined by fixing the numerical value of the Boltzmann constant to 1.380649×10⁻²³ J·K⁻¹. It uses absolute zero as its null point and increments equal to those of the Celsius scale. One kelvin equals one degree Celsius in magnitude but starts at absolute zero, representing the lowest physically possible temperature [bipm-si-brochure]. The kelvin scale was named after William Thomson, 1st Baron Kelvin, who proposed an absolute thermodynamic temperature scale in 1848. It was formally adopted as an SI base unit in 1967–1968 by the CGPM to provide a universal temperature standard based on fundamental constants [cgpm-resolutions]. Kelvin is the standard temperature unit in scientific research, thermodynamics, and engineering worldwide. It is the official unit for temperature in physics and chemistry according to the International System of Units (SI), used globally including by NIST and BIPM member countries [nist-si-guide].
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: kelvin degree, kelvins, kelvins unit, kelvian, kelvins scale, reaumer, reaumur, reaumur scale, réamer. All of these refer to the Kelvin to Réaumur conversion.