Reaumur is a historical temperature scale.
Reaumurs to Fahrenheit Converter — Re to F
Convert Reaumur (Re) to Fahrenheit (F) using the exact temperature formula. See the formula, worked examples, conversion table, history, and common uses.
Reaumurs to Fahrenheit converter
Converter
Temperature Converter
Convert Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Reaumur, and Romer.
Context values
Some unit families need one extra value for a physically accurate result.
Fahrenheit is a temperature scale with water freezing at 32 F and boiling at 212 F.
Convert the source temperature to Kelvin, then convert Kelvin to the target scale.
Temperature conversion uses Kelvin as the intermediate absolute scale.
Reserved above the conversion cards and below the converter.
About Converting Reaumurs to Fahrenheit
Fahrenheit is a widely used everyday temperature scale, while Reaumur is a historical temperature scale no longer in common use — this conversion is mainly useful for historical reference or comparing older scientific texts against modern figures.
Formula
Convert the source temperature to Kelvin, then convert Kelvin to the target scale.
Both scales are converted through Kelvin as a common absolute reference point.
Simple example
(0 − 32) × 5/9 = 32 °C
0 reaumurs = 32 fahrenheit.
Real-world example
(0 − 32) × 5/9 = 32 °C
0 reaumurs = 32 fahrenheit.
Conversion table
| Reaumur (Re) | Fahrenheit (F) |
|---|---|
| -40 Re | -58 F |
| -20 Re | -13 F |
| 0 Re | 32 F |
| 20 Re | 77 F |
| 37 Re | 115.25 F |
| 100 Re | 257 F |
Reverse conversion: Fahrenheit to Reaumur
(34.25 − 32) × 5/9 = 1 °C
34.25 fahrenheit = 1 reaumur.
Convert the source temperature to Kelvin, then convert Kelvin to the target scale.
For a page dedicated to this direction, see Fahrenheit to Reaumur.
Understanding the Reaumur (Re)
Reaumur is a historical temperature scale.
Understanding the Fahrenheit
Fahrenheit (F) measures temperature. Fahrenheit sets water's freezing point at 32 °F and boiling point at 212 °F at standard atmospheric pressure. It is classified as a Non-SI temperature scale.
Where it's used: United States (primary everyday temperature scale) A small number of other territories, e.g. the Bahamas, Belize, Cayman Islands, Liberia, Palau
Uses of the Fahrenheit today
- Everyday weather reporting and thermostats in the US
- Cooking temperatures in US recipes
- Some US industrial and HVAC contexts
History of the Fahrenheit
German physicist Daniel Gabriel Fahrenheit developed the scale around 1724, originally basing 0° on the coldest temperature he could reliably reproduce with an ice-salt mixture, and calibrating other points using human body temperature and the freezing point of water.
The modern Fahrenheit scale was later standardized so that water freezes at exactly 32 °F and boils at exactly 212 °F at one standard atmosphere, giving 180 degrees between the two reference points.
Historical origin. Fahrenheit was not the invention of a single named person; it developed through the process described above.
Fahrenheit — sources
- NIST — Temperature scales overview — History and modern definitions of Fahrenheit and Celsius.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many fahrenheit are in 1 reaumur?
1 reaumur equals 34.25 fahrenheit, using the offset temperature formula rather than an estimate.
How do I convert reaumur to fahrenheit?
Use the formula shown above: it involves both a multiplication and an addition/subtraction because the two scales don't share a common zero point.
How do I convert fahrenheit back to reaumur?
Use the reverse factor: 1 fahrenheit equals -13.77777778 reaumurs. You can also use the swap control in the converter above to flip the direction instantly.
What is a reaumur?
Reaumur (Re) is a unit of temperature.
What is a fahrenheit?
Fahrenheit (F) measures temperature. Fahrenheit sets water's freezing point at 32 °F and boiling point at 212 °F at standard atmospheric pressure. It is classified as a Non-SI temperature scale.
Is the Reaumur to Fahrenheit conversion exact?
Yes. Both scales are formally defined relative to the Kelvin scale, so the conversion formula is exact — the only rounding involved is in how many decimal places you choose to display.