Rankine to Delisle (°R → °De)
Formula
°R → kelvin → °DeConversion Table
| °R | °De |
|---|---|
| 0 | 559.72 |
| 1.0000 | 558.89 |
| 2.0000 | 558.06 |
| 3.0000 | 557.22 |
| 4.0000 | 556.39 |
| 5.0000 | 555.56 |
| 6.0000 | 554.73 |
| 7.0000 | 553.89 |
| 8.0000 | 553.06 |
| 9.0000 | 552.22 |
| 10.000 | 551.39 |
| 11.000 | 550.56 |
| 12.000 | 549.72 |
| 13.000 | 548.89 |
| 14.000 | 548.06 |
| 15.000 | 547.23 |
| 16.000 | 546.39 |
| 17.000 | 545.56 |
| 18.000 | 544.72 |
| 19.000 | 543.89 |
| °R | °De |
|---|---|
| 20.000 | 543.06 |
| 21.000 | 542.22 |
| 22.000 | 541.39 |
| 23.000 | 540.56 |
| 24.000 | 539.73 |
| 25.000 | 538.89 |
| 26.000 | 538.06 |
| 27.000 | 537.22 |
| 28.000 | 536.39 |
| 29.000 | 535.56 |
| 30.000 | 534.72 |
| 31.000 | 533.89 |
| 32.000 | 533.06 |
| 33.000 | 532.23 |
| 34.000 | 531.39 |
| 35.000 | 530.56 |
| 36.000 | 529.72 |
| 37.000 | 528.89 |
| 38.000 | 528.06 |
| 39.000 | 527.22 |
| °R | °De |
|---|---|
| 40.000 | 526.39 |
| 41.000 | 525.56 |
| 42.000 | 524.73 |
| 43.000 | 523.89 |
| 44.000 | 523.06 |
| 45.000 | 522.22 |
| 46.000 | 521.39 |
| 47.000 | 520.56 |
| 48.000 | 519.72 |
| 49.000 | 518.89 |
| 50.000 | 518.06 |
| 51.000 | 517.23 |
| 52.000 | 516.39 |
| 53.000 | 515.56 |
| 54.000 | 514.72 |
| 55.000 | 513.89 |
| 56.000 | 513.06 |
| 57.000 | 512.22 |
| 58.000 | 511.39 |
| 59.000 | 510.56 |
| °R | °De |
|---|---|
| 60.000 | 509.73 |
| 61.000 | 508.89 |
| 62.000 | 508.06 |
| 63.000 | 507.22 |
| 64.000 | 506.39 |
| 65.000 | 505.56 |
| 66.000 | 504.72 |
| 67.000 | 503.89 |
| 68.000 | 503.06 |
| 69.000 | 502.23 |
| 70.000 | 501.39 |
| 71.000 | 500.56 |
| 72.000 | 499.72 |
| 73.000 | 498.89 |
| 74.000 | 498.06 |
| 75.000 | 497.22 |
| 76.000 | 496.39 |
| 77.000 | 495.56 |
| 78.000 | 494.73 |
| 79.000 | 493.89 |
Rankine to Delisle Conversion
Converting Rankine (°R) to Delisle (°De) is a common temperature conversion. 1 °R equals 558.891667 °De. For example, 100 °R is equal to 476.391667 °De.
Quick Mental Math: Rankine to Delisle
Divide by 1.20 to convert rankine to delisle.
Why is converting Rankine to Delisle tricky?
The conversion factor requires careful attention to avoid reversing the operation.
Reference Temperatures
Absolute zero: 0 °R = 559.725 °De. Water freezing point: 491.67 °R = 150 °De. Room temperature: 527.67 °R = 120 °De. Body temperature: 558.27 °R = 94.5 °De. Water boiling point: 671.67 °R = 0 °De.
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 Delisle?
Delisle (°De) is a unit of temperature. The Delisle scale measures temperature with zero at the boiling point of water and increasing values downward. One degree Delisle equals 2/3 of a degree Celsius, making it inversely proportional to Celsius. This scale is now mostly historical and not used in modern thermometry [cgpm-resolutions]. Invented by Joseph-Nicolas Delisle in 1732, the scale was devised for scientific observations in Russia. It fixed 0 °De at 100 °C (water boiling point) and increased toward freezing point, opposite to Celsius. The scale fell out of use in favor of Celsius and Kelvin as international standards emerged [cgpm-resolutions]. The Delisle scale is obsolete and retained only in historical scientific texts and specialized archival references. Modern temperature measurements universally use Celsius, Fahrenheit, or Kelvin. Organizations like BIPM do not recognize Delisle for current temperature calibration [bipm-si-brochure].
Common Misspellings
People often search for this conversion using these alternate spellings: rankin, rankinee, rankinne, rankin temperature, Delislee, Delisleu, Delisell, Delislee scale, Delisle temperature. All of these refer to the Rankine to Delisle conversion.