Rankine to Réaumur Converter
Unit Converter
Instant · Precise · Universal
6 units available
6 categories total
How to Convert Rankine to Réaumur
To Fahrenheit: °F = °R − 459.67. To Celsius: °C = (°R − 491.67) × 5/9. To Kelvin: K = °R × 5/9.
°R = °F + 459.67. The Rankine scale is to Fahrenheit what Kelvin is to Celsius. Same degree size as Fahrenheit.
For example, 1 Rankine (°R) = -218.0755556 Réaumur (°Ré).
Rankine to Réaumur — Common Values
| Rankine (°R) | Réaumur (°Ré) |
|---|---|
| 0.1 | -218.4755556 |
| 0.5 | -218.2977778 |
| 1 | -218.0755556 |
| 2 | -217.6311111 |
| 5 | -216.2977778 |
| 10 | -214.0755556 |
| 25 | -207.4088889 |
| 50 | -196.2977778 |
| 100 | -174.0755556 |
| 500 | 3.702222222 |
| 1000 | 225.9244444 |
About Rankine (°R)
Definition
The degree Rankine is an absolute temperature scale using the Fahrenheit degree size, where 0 °R equals absolute zero (−459.67 °F).
Mathematical Relationship
°R = °F + 459.67. The Rankine scale is to Fahrenheit what Kelvin is to Celsius. Same degree size as Fahrenheit.
Conversion Formula
To Fahrenheit: °F = °R − 459.67. To Celsius: °C = (°R − 491.67) × 5/9. To Kelvin: K = °R × 5/9.
Practical Applications
US engineering thermodynamics calculations, gas turbine design, and some aerospace engineering applications.
Interesting Facts
Water freezes at 491.67 °R and boils at 671.67 °R. The Rankine scale is one of the four main temperature scales still in use.
Common Mistakes
Confusing Rankine with Réaumur — both use 'R' but are completely different scales. Use °R vs. °Ré to distinguish.
Educational Tips
Rankine is to Fahrenheit as Kelvin is to Celsius. Both absolute scales start at 0 = absolute zero, just with different degree sizes.
About Réaumur (°Ré)
Definition
The degree Réaumur is a historical temperature scale where water freezes at 0 °Ré and boils at 80 °Ré at standard pressure.
Mathematical Relationship
1 °Ré = 1.25 °C. The Réaumur scale divides the freezing-to-boiling range of water into 80 degrees instead of 100.
Conversion Formula
To Celsius: °C = °Ré × 5/4. To Fahrenheit: °F = °Ré × 9/4 + 32. To Kelvin: K = °Ré × 5/4 + 273.15.
Practical Applications
Some traditional Italian pasta and cheese production references still mention Réaumur temperatures from historical recipes.
Interesting Facts
Réaumur used an alcohol-based thermometer, not mercury. Russia used the Réaumur scale as its standard until the early 20th century.
Common Mistakes
Confusing °Ré with °R (Rankine) — they are entirely different scales. Always use the full abbreviation °Ré.
Educational Tips
Think of Réaumur as 'Celsius with 80 divisions instead of 100.' Multiply Réaumur by 1.25 to get Celsius.