How to convert degrees Réaumur to degrees Rankine
°R = °Ré × 9/4 + 491.67Temperature scales have different zero points, so the conversion needs an offset as well as a scale factor. In one step: °R = °Ré × 2.25 + 491.67.
Worked examples
- 0 degrees Réaumur0 × 9/4 + 491.67 = 491.67 °R
- 20 degrees Réaumur20 × 9/4 + 491.67 = 536.67 °R
- 40 degrees Réaumur40 × 9/4 + 491.67 = 581.67 °R
- 60 degrees Réaumur60 × 9/4 + 491.67 = 626.67 °R
- 80 degrees Réaumur80 × 9/4 + 491.67 = 671.67 °R
Degrees Réaumur to degrees Rankine conversion table
Values are calculated by the conversion engine using the full formula and rounded to 8 significant figures.
| Degrees Réaumur (°Ré) | Degrees Rankine (°R) |
|---|---|
| −20 °Ré | 446.67 °R |
| −10 °Ré | 469.17 °R |
| 0 °Ré | 491.67 °R |
| 5 °Ré | 502.92 °R |
| 10 °Ré | 514.17 °R |
| 15 °Ré | 525.42 °R |
| 20 °Ré | 536.67 °R |
| Degrees Réaumur (°Ré) | Degrees Rankine (°R) |
|---|---|
| 25 °Ré | 547.92 °R |
| 30 °Ré | 559.17 °R |
| 40 °Ré | 581.67 °R |
| 50 °Ré | 604.17 °R |
| 60 °Ré | 626.67 °R |
| 70 °Ré | 649.17 °R |
| 80 °Ré | 671.67 °R |
About the units
Degree Réaumur (°Ré)
A historical scale with water freezing at 0 °Ré and boiling at 80 °Ré.
Degree Rankine (°R)
An absolute scale with Fahrenheit-sized degrees: 0 °R is absolute zero and 491.67 °R is the freezing point of water. Used in some US thermodynamics work.
Frequently asked questions
What is the formula to convert degrees Réaumur to degrees Rankine?
°R = °Ré × 9/4 + 491.67. Temperature scales have different zero points, so the conversion needs an offset as well as a scale factor. In one step: °R = °Ré × 2.25 + 491.67.
What is 20 degrees Réaumur in degrees Rankine?
20 °Ré = 536.67 °R.
What is 0 °Ré in °R?
0 °Ré = 491.67 °R.
Can I just multiply to convert degrees Réaumur to degrees Rankine?
No. °Ré and °R have different zero points, so a single multiplication gives the wrong answer. Use the full formula above, or the converter. To convert a temperature difference (such as a 10-degree rise), use the temperature interval converter instead.
Is this °Ré to °R converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.