Réaumur to Fahrenheit Conversion Calculator: Free Online Tool
Convert degrees Réaumur to degrees Fahrenheit with our free online temperature converter.
Réaumur to Fahrenheit Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Réaumur).
- The converted value in Fahrenheit will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Temperature category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Réaumur to Fahrenheit
Temperature conversions like Réaumur to Fahrenheit use specific non-linear formulas.
Formula:
First convert °Ré to °C: °C = °Ré × 5/4. Then convert °C to °F: °F = (°C × 9/5) + 32Example Calculation:
Convert 10°Ré:
1. °C = 10 × 5/4 = 12.50°C
2. °F = (12.50 × 9/5) + 32 = 54.5°F
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Réaumur and a Fahrenheit?
The Réaumur scale (°Ré, °Re, °R) is a temperature scale where the freezing point of water is 0 degrees and the boiling point is 80 degrees.
Degree Fahrenheit (°F) is a unit of temperature on the Fahrenheit scale, a temperature scale developed by Daniel Gabriel Fahrenheit. On this scale, the freezing point of water is defined as 32°F and the boiling point as 212°F, placing the two points 180 degrees apart. It is primarily used in the United States and a few other countries for everyday temperature measurements.
Note: The Réaumur is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Fahrenheit belongs to the imperial/US customary system.
History of the Réaumur and Fahrenheit
Developed by René Antoine Ferchault de Réaumur in 1730, it was based on the expansion of alcohol. He marked the freezing point as 0 and the boiling point of the alcohol solution as 80. It gained popularity in parts of Europe, particularly France and Germany, but has largely been replaced by Celsius.
The Fahrenheit scale was proposed in 1724 by the physicist Daniel Gabriel Fahrenheit. He initially defined 0°F based on the temperature of a brine solution (ice, water, and ammonium chloride) and set human body temperature at 96°F. Later refinements adjusted the scale so that water's freezing point was exactly 32°F and boiling point exactly 212°F.
Common Uses for degrees Réaumur and degrees Fahrenheit
Explore the typical applications for both Réaumur (imperial/US) and Fahrenheit (imperial/US) to understand their common contexts.
Common Uses for degrees Réaumur
- Historical Context: Found in old scientific literature and historical documents.
- Specific Industries: Occasionally used in some specific contexts, such as cheesemaking in Italy (for Parmigiano-Reggiano) or for measuring sugar syrup temperature in some Dutch cooking.
Common Uses for degrees Fahrenheit
- US Weather: Everyday weather reporting and forecasting in the United States and its territories.
- US Domestic: Domestic temperature settings (thermostats, ovens) in the US.
- US Medical: Medical temperature measurements in the US.
- US Culinary: Some cooking applications, particularly in recipes originating from the US.
Frequently Asked Questions
Questions About Réaumur (°Ré)
What are the freezing and boiling points of water in Réaumur?
Water freezes at 0 °Ré and boils at 80 °Ré.
How does Réaumur relate to Celsius?
The Réaumur degree is larger than the Celsius degree. The formula is °Ré = °C × 4/5.
Is the Réaumur scale still commonly used?
No, it is rarely used today, having been largely superseded by the Celsius scale.
About Fahrenheit (°F)
Why is the freezing point of water 32°F?
Fahrenheit's initial scale used different reference points. When the scale was later standardized using water, the freezing point landed at 32°F based on the original scale's divisions.
How does Fahrenheit relate to Celsius?
The relationship is linear but involves an offset. To convert Fahrenheit to Celsius, use the formula: °C = (°F - 32) * 5/9. To convert Celsius to Fahrenheit: °F = (°C * 9/5) + 32.
Where is Fahrenheit still commonly used?
The United States is the primary country that uses Fahrenheit for everyday temperature measurements. It's also used in some Caribbean countries and US territories like Puerto Rico, Guam, and the U.S. Virgin Islands. Most other countries use Celsius.