Rankine to Réaumur (°R to °Ré) Converter
1 Rankine equals -218.0756 Réaumur (1 °R = -218.0756 °Ré). Convert Rankine to Réaumur with formula, table, and examples.
To convert Rankine to Reaumur, use the formula: Re = (R - 491.67) x 4/9. The Rankine scale is the absolute Fahrenheit scale used in US thermodynamic engineering, while the Reaumur scale is the historical European scale once standard in France and Germany. Water freezes at 491.67 degrees R (0 Re) and boils at 671.67 degrees R (80 Re).
How to Convert Rankine to Réaumur
- Convert to Kelvin: K = °R * 5 / 9
- Convert to Réaumur: °Ré = (K - 273.15) * 4 / 5
- Read the result in Réaumur
Common Rankine to Réaumur Conversions
| Rankine (°R) | Réaumur (°Ré) | Status |
|---|---|---|
| 0 °R | -218.52 °Ré | |
| 100 °R | -174.08 °Ré | |
| 200 °R | -129.63 °Ré | |
| 300 °R | -85.19 °Ré | |
| 400 °R | -40.74 °Ré | |
| 459 °R | -14.52 °Ré | |
| 491.67 °R | 0 °Ré | |
| 500 °R | 3.7 °Ré | |
| 530 °R | 17.04 °Ré | |
| 559 °R | 29.92 °Ré | |
| 600 °R | 48.15 °Ré | |
| 671.67 °R | 80 °Ré | |
| 700 °R | 92.59 °Ré | |
| 800 °R | 137.04 °Ré | |
| 1,000 °R | 225.92 °Ré |
Good to Know About Rankine to Réaumur Conversion
The history of temperature measurement is the history of scientific collaboration and competition across borders. The Rankine scale (used in American aerospace and chemical engineering) and the Reaumur scale (once widespread in continental Europe) represent different national contributions to solving the same fundamental problem: how to assign numbers to the sensation of hot and cold.
Rankine to Réaumur: What You Need to Know
The Rankine scale was created by William Rankine, 1859, used in American aerospace and chemical engineering. The Reaumur scale was created by Rene Antoine Ferchault de Reaumur, 1730, once widespread in continental Europe. Converting between them bridges different eras and different measurement philosophies in the history of thermometry.
What is a Rankine? °R
An absolute temperature scale using Fahrenheit-sized degrees. 0 °R equals absolute zero. Used in some US engineering applications, especially thermodynamics.
Learn more about Rankine →What is a Réaumur? °Ré
A historical temperature scale where water freezes at 0 °Ré and boils at 80 °Ré. Named after René Antoine Ferchault de Réaumur. Once widely used in Europe.
Learn more about Réaumur →Going the other way? Use our Réaumur to Rankine converter.
Rankine to Réaumur FAQ
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Use the formula Re = (R - 491.67) x 4/9. At the freezing point of water: 491.67 R = 0 Re. At the boiling point: 671.67 R = 80 Re.
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This conversion is needed when interpreting historical scientific records, comparing temperature data across different measurement traditions, or completing engineering calculations that mix temperature scales from different national standards.
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Water freezes at 491.67 R = 0 Re. Water boils at 671.67 R = 80 Re. These two fixed points anchor both scales and provide easy verification of any conversion calculation.
Non-Frequently Asked Questions About Rankine to Réaumur
Questions nobody should ask - but someone did.
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Rankine is the ghost of American engineering past (still occasionally seen in thermodynamic calculations). Reaumur is the ghost of European culinary past (still occasionally seen in cheese-making references). Their conversion is a handshake between two apparitions from different measurement traditions, neither fully alive nor fully dead.
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A typical bread-baking oven at 230 degrees Celsius (184 degrees Reaumur) operates at about 905 degrees Rankine. Expressing French baking temperatures in American engineering units produces numbers that sound like rocket engine exhaust. Both numbers describe the same perfectly ordinary oven, proving that temperature is universal even when its expression is culture-specific.
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It is difficult to construct a realistic scenario. American thermodynamic engineers (Rankine users) and European food artisans (historical Reaumur users) occupy entirely non-overlapping professional domains. The conversion exists for mathematical completeness, not for solving anyone's actual problem. It is the measurement equivalent of a bridge between two islands that nobody needs to visit simultaneously.
Related Articles About Rankine to Réaumur
Need the reverse? Use our Réaumur to Rankine converter. See all Temperature converters.