How do you convert Reaumur to Kelvin?

Use the formula K = Re x 5/4 + 273.15. At the freezing point of water: 0 Re = 273.15 K. At the boiling point: 80 Re = 373.15 K.

When would you need to convert Reaumur to Kelvin?

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.

What are the key reference points for both scales?

Water freezes at 0 Re = 273.15 K. Water boils at 80 Re = 373.15 K. These two fixed points anchor both scales and provide easy verification of any conversion calculation.

Réaumur to Kelvin (°Ré to K) Converter

1 °Ré = 274.4 K

1 Réaumur equals 274.4 Kelvin (1 °Ré = 274.4 K). Convert Réaumur to Kelvin with formula, table, and examples.

To convert Reaumur to Kelvin, use the formula: K = Re x 5/4 + 273.15. The Reaumur scale is the historical European scale once standard in France and Germany, while the Kelvin scale is the absolute SI temperature unit used in science worldwide. Water freezes at 0 degrees Re (273.15 K) and boils at 80 degrees Re (373.15 K).

How to Convert Réaumur to Kelvin

°Ré via Kelvin to K

Formula: Réaumur to Kelvin

Convert to Kelvin: K = °Ré * 5 / 4 + 273.15
Convert to Kelvin: K = K
Read the result in Kelvin

Common Réaumur to Kelvin Conversions

Réaumur (°Ré)	Kelvin (K)	Status
-30 °Ré	235.65 K
-20 °Ré	248.15 K
-10 °Ré	260.65 K
0 °Ré	273.15 K
5 °Ré	279.4 K
10 °Ré	285.65 K
15 °Ré	291.9 K
20 °Ré	298.15 K
25 °Ré	304.4 K
30 °Ré	310.65 K
40 °Ré	323.15 K
50 °Ré	335.65 K
60 °Ré	348.15 K
70 °Ré	360.65 K
80 °Ré	373.15 K
100 °Ré	398.15 K
200 °Ré	523.15 K

Good to Know About Réaumur to Kelvin Conversion

The history of temperature measurement is the history of scientific collaboration and competition across borders. The Reaumur scale (once widespread in continental Europe) and the Kelvin scale (the SI standard for thermodynamics) represent different national contributions to solving the same fundamental problem: how to assign numbers to the sensation of hot and cold.

Réaumur to Kelvin: What You Need to Know

The Reaumur scale was created by Rene Antoine Ferchault de Reaumur, 1730, once widespread in continental Europe. The Kelvin scale was created by Lord Kelvin (William Thomson), 1848, the SI standard for thermodynamics. Converting between them bridges different eras and different measurement philosophies in the history of thermometry.

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.

Historical historical cheese making European history

Learn more about Réaumur →

What is a Kelvin? K

The SI base unit of temperature. 0 K is absolute zero, the theoretical lowest possible temperature. Used in science and engineering.

Metric physics chemistry engineering

Learn more about Kelvin →

Going the other way? Use our Kelvin to Réaumur converter.

Réaumur to Kelvin FAQ

Use the formula K = Re x 5/4 + 273.15. At the freezing point of water: 0 Re = 273.15 K. At the boiling point: 80 Re = 373.15 K.
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.
Water freezes at 0 Re = 273.15 K. Water boils at 80 Re = 373.15 K. These two fixed points anchor both scales and provide easy verification of any conversion calculation.

Non-Frequently Asked Questions About Réaumur to Kelvin

Questions nobody should ask - but someone did.

Every temperature feels the same regardless of the scale you use to describe it. A comfortable room is comfortable whether you call it by its Reaumur or Kelvin value. Temperature scales change the number, not the physics. Your skin cannot tell the difference between measurement systems.
Unless you are applying to work in a museum of scientific instruments or writing the world's most comprehensive conversion website, this particular skill would raise more questions than it answers in a job interview. But it does demonstrate attention to detail and a fondness for completeness - qualities any employer should appreciate.
Weather apps already struggle to present temperature clearly in one or two scales. Adding Reaumur and Kelvin would turn a simple forecast into a mathematics lecture. Users would see five or more numbers for the same temperature, causing decision paralysis about whether to bring a jacket. Simplicity in weather communication is not a luxury - it is a safety feature.