Fahrenheit to Réaumur Converter
Unit Converter
Instant · Precise · Universal
6 units available
6 categories total
How to Convert Fahrenheit to Réaumur
To Celsius: °C = (°F − 32) × 5/9. To Kelvin: K = (°F − 32) × 5/9 + 273.15. To Rankine: °R = °F + 459.67.
The Fahrenheit scale has 180 degrees between freezing (32 °F) and boiling (212 °F), compared to 100 degrees in Celsius.
For example, 1 Fahrenheit (°F) = -13.77777778 Réaumur (°Ré).
Fahrenheit to Réaumur — Common Values
| Fahrenheit (°F) | Réaumur (°Ré) |
|---|---|
| 0.1 | -14.17777778 |
| 0.5 | -14 |
| 1 | -13.77777778 |
| 2 | -13.33333333 |
| 5 | -12 |
| 10 | -9.777777778 |
| 25 | -3.111111111 |
| 50 | 8 |
| 100 | 30.22222222 |
| 500 | 208 |
| 1000 | 430.2222222 |
About Fahrenheit (°F)
Definition
The degree Fahrenheit is a temperature unit where water freezes at 32 °F and boils at 212 °F at standard atmospheric pressure, with 180 equal divisions between these points.
Mathematical Relationship
The Fahrenheit scale has 180 degrees between freezing (32 °F) and boiling (212 °F), compared to 100 degrees in Celsius.
Conversion Formula
To Celsius: °C = (°F − 32) × 5/9. To Kelvin: K = (°F − 32) × 5/9 + 273.15. To Rankine: °R = °F + 459.67.
Practical Applications
US weather forecasts, oven temperatures in American cooking, pool and hot tub settings, and thermostat controls in American homes.
Interesting Facts
Fahrenheit originally set human body temperature as 96 °F (a number divisible by 12). The modern accepted value is 98.6 °F (37 °C).
Common Mistakes
Forgetting to subtract 32 before multiplying by 5/9 when converting to Celsius. Also confusing °F with °C in international recipes.
Educational Tips
Quick anchors: 32 °F = freezing, 72 °F = comfortable room, 98.6 °F = body, 212 °F = boiling. For quick °F→°C: subtract 30, divide by 2.
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.