Réaumur to Kelvin Converter
Convert Réaumur (°Ré) to Kelvin (K) instantly. Formula: K = (°Ré × 5/4) + 273.15.
Temperature Converter
5 units available
1 °Ré = 274.4 K
Formula:
K = (°Ré × 5/4) + 273.15With your value: 1 °Ré = 274.4 K
Other Réaumur to Kelvin conversions
Réaumur to Kelvin Conversion Table
| Réaumur (°Ré) | Kelvin (K) |
|---|---|
| 0.5 | 273.775 |
| 1 | 274.4 |
| 2 | 275.65 |
| 5 | 279.4 |
| 10 | 285.65 |
| 15 | 291.9 |
| 20 | 298.15 |
| 25 | 304.4 |
| 50 | 335.65 |
| 100 | 398.15 |
| 250 | 585.65 |
| 500 | 898.15 |
| 1000 | 1,523.15 |
Kelvin to Réaumur Conversion Table
| Kelvin (K) | Réaumur (°Ré) |
|---|---|
| 0.5 | -218.12 |
| 1 | -217.72 |
| 2 | -216.92 |
| 5 | -214.52 |
| 10 | -210.52 |
| 15 | -206.52 |
| 20 | -202.52 |
| 25 | -198.52 |
| 50 | -178.52 |
| 100 | -138.52 |
| 250 | -18.52 |
| 500 | 181.48 |
| 1000 | 581.48 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Réaumur (°Ré)
Temperature
Traceable to the kelvin, defined by fixing the Boltzmann constant at 1.380 649 × 10⁻²³ J/K. Celsius and Fahrenheit are exact affine transforms of the kelvin scale.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Kelvin (K)
Temperature
Traceable to the kelvin, defined by fixing the Boltzmann constant at 1.380 649 × 10⁻²³ J/K. Celsius and Fahrenheit are exact affine transforms of the kelvin scale.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Réaumur to Kelvin
This conversion uses an offset formula, so it cannot be described by a single multiplication factor.
Formula: K = (°Ré × 5/4) + 273.15
Reverse: °Ré = (K - 273.15) × 4/5
Step-by-Step Example
- Start with your value in Réaumur. For example: 5 °Ré
- Apply K = (°Ré × 5/4) + 273.15
- The result is: 279.4 K
About Réaumur
The Réaumur scale sets water's freezing point at 0 °Ré and its boiling point at 80 °Ré. It survives in a few European cheese and syrup recipes.
Common uses: historic recipes, history of science.
About Kelvin
The Kelvin scale is the SI unit of temperature that starts at absolute zero (−273.15°C). It is used extensively in scientific research.
Fun Fact: At 0 Kelvin (absolute zero), all molecular motion stops. It has never been fully achieved in a laboratory.
Common uses: physics, astronomy, chemistry.
Frequently Asked Questions
How many Kelvin are in 1 Réaumur?
There are exactly 274.4 Kelvin in 1 Réaumur.
What is the formula to convert Réaumur to Kelvin?
The formula to convert Réaumur to Kelvin is: K = (°Ré × 5/4) + 273.15. For example, to convert 10 Réaumur to Kelvin, you would apply the formula to 10.
What is a Réaumur?
The Réaumur scale sets water's freezing point at 0 °Ré and its boiling point at 80 °Ré. It survives in a few European cheese and syrup recipes.
What is a Kelvin?
The Kelvin scale is the SI unit of temperature that starts at absolute zero (−273.15°C). It is used extensively in scientific research.
What are the common uses of Réaumur?
The Réaumur is commonly used in historic recipes, history of science.
Related Temperature Conversions
Cite this page
UnitConvertLab. (2026). Réaumur to Kelvin converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/reaumur-to-kelvin