4 Réaumur to Kelvin
Quick answer
4 Réaumur (°Ré) equals
278.15 K
To convert 4 Réaumurs to kelvins, multiply by 274.4. Therefore, 4 Réaumur (°Ré) equals 278.15 Kelvin (K).
Formula: K = (°Ré × 5/4) + 273.15. Calculation: 278.15 K. Reverse: °Ré = (K - 273.15) × 4/5.
Convert Réaumur (°Ré) to Kelvin (K) online with our free unit converter. Calculated using formula: K = (°Ré × 5/4) + 273.15. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Réaumur to Kelvin
- Step 1 — start with the formula. K = (°Ré × 5/4) + 273.15
- Step 2 — substitute your figure. Apply the formula to 4 °Ré.
- Step 3 — read the result. 4 °Ré = 278.15 K
- Step 4 — check it in reverse. °Ré = (K - 273.15) × 4/5 returns 4 °Ré, which matches the figure you started with.
Temperature Converter
5 units available
4 °Ré = 278.15 K
Formula:
K = (°Ré × 5/4) + 273.15With your value: 4 °Ré = 278.15 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
Réaumur and Kelvin Relationship
This calculation facilitates standardized conversion between recognized units of temperature. Unlike simple multiplicative factors, this conversion follows an affine calculation model: K = (°Ré × 5/4) + 273.15. Understanding the relationship between Réaumur and Kelvin is essential for accurate calculations in physics, engineering, commerce, and daily applications.
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 of Réaumur: 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 of Kelvin: physics, astronomy, chemistry.
Frequently Asked Questions
- What is 4 Réaumur in Kelvin?
- 4 Réaumur equals 278.15 Kelvin.
- How many kelvins are in 1 Réaumur?
- There are exactly 274.4 kelvins 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 Réaumurs to kelvins, 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). 4 Réaumur to Kelvin. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/4-reaumur-to-kelvin