Reaumur to Kelvin Converter
Enter the value that you want to convert Reaumur (°r) to kelvin (K) or kelvin to Reaumur.Also written as °R to K conversion.
1 Reaumur = 274.4000000 kelvin
Formula: K = °Ré × 5/4 + 273.15
°R to K — Reaumur to kelvin
10 Reaumur = 285.65000 kelvin
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Reaumur vs Kelvin
Understanding the Reaumur
The Réaumur scale sets water's freezing point at 0° and boiling point at 80°, created by French scientist René Antoine Ferchault de Réaumur in 1730.
Once widely used in Europe (particularly France, Germany, and Russia), the Réaumur scale (°Ré) has been almost entirely replaced by Celsius. However, it persists in some traditional industries: Italian and Swiss cheese-making (specifying milk temperatures during production), some French cooking traditions, and historical weather records. The scale is notable for having only 80 divisions between freezing and boiling, making each Réaumur degree 1.25 Celsius degrees.
The Kelvin Explained
The Kelvin scale begins at absolute zero (−273.15°C) — the theoretical lowest possible temperature where all molecular motion ceases.
Kelvin (K) is the SI base unit of temperature, essential in physics, chemistry, and engineering. It uses the same increment size as Celsius but starts at absolute zero. Key values: 0 K = absolute zero, 273.15 K = water freezes, 373.15 K = water boils. Kelvin is required for gas law calculations (PV=nRT), thermodynamic efficiency, color temperature in photography/lighting (5500K = daylight), and cryogenic engineering.
Temperature Scales in Context
Temperature conversion is one of the few non-linear unit conversions people encounter daily. Celsius dominates scientific work and most countries, Fahrenheit remains standard in the US for weather and cooking, Kelvin is required in thermodynamics and gas law calculations, and Rankine appears in some US engineering applications. Converting between these scales requires formulas rather than simple multiplication.
Reaumur to kelvin metric conversion table
| 0.01 °r | = | 273.16250 K |
| 0.1 °r | = | 273.27500 K |
| 1 °r | = | 274.40000 K |
| 2 °r | = | 275.65000 K |
| 3 °r | = | 276.90000 K |
| 4 °r | = | 278.15000 K |
| 5 °r | = | 279.40000 K |
| 6 °r | = | 280.65000 K |
| 7 °r | = | 281.90000 K |
| 8 °r | = | 283.15000 K |
| 9 °r | = | 284.40000 K |
| 10 °r | = | 285.65000 K |
| 11 °r | = | 286.90000 K |
| 12 °r | = | 288.15000 K |
| 13 °r | = | 289.40000 K |
| 14 °r | = | 290.65000 K |
| 15 °r | = | 291.90000 K |
| 16 °r | = | 293.15000 K |
| 17 °r | = | 294.40000 K |
| 18 °r | = | 295.65000 K |
| 19 °r | = | 296.90000 K |
| 20 °r | = | 298.15000 K |
| 30 °r | = | 310.65000 K |
| 40 °r | = | 323.15000 K |
| 50 °r | = | 335.65000 K |
| 60 °r | = | 348.15000 K |
| 70 °r | = | 360.65000 K |
| 80 °r | = | 373.15000 K |
| 90 °r | = | 385.65000 K |
| 100 °r | = | 398.15000 K |
| 200 °r | = | 523.15000 K |
| 300 °r | = | 648.15000 K |
| 400 °r | = | 773.15000 K |
| 500 °r | = | 898.15000 K |
| 600 °r | = | 1023.15000 K |
| 700 °r | = | 1148.15000 K |
| 800 °r | = | 1273.15000 K |
| 900 °r | = | 1398.15000 K |
| 1000 °r | = | 1523.15000 K |
How to Convert °R to K (Reaumur to Kelvin)?
We can convert Reaumur to kelvin by using an example.
Example:
Convert 20 Reaumur to Kelvin?
We know 1 Reaumur = 274.4000000 kelvin; 1 Kelvin = -217.7200000 Reaumur.
20 Reaumur = ___K
20 × 274.4000000 = 298.15000 K (we know 1 Reaumur = 274.4000000 kelvin)
Answer:
20 Reaumur = 298.15000 kelvin
Réaumur to Kelvin Conversion
Convert through Celsius: K = (°Ré × 5/4) + 273.15:
- Multiply Réaumur by 5/4 (1.25) to get Celsius.
- Add 273.15 to get Kelvin.
- Combined: K = (°Ré × 1.25) + 273.15
Solved Examples
Question 1: Convert 0°Ré to Kelvin.
Solution:
K = (0 × 1.25) + 273.15
Answer: 0°Ré = 273.15 K (water freezing)
Question 2: Convert 80°Ré to Kelvin.
Solution:
K = (80 × 1.25) + 273.15
= 100 + 273.15
Answer: 80°Ré = 373.15 K (water boiling)
Practice Questions
Try solving these on your own to test your understanding:
- Convert 40°Ré to Kelvin. (Answer: 323.15 K)
- What is -16°Ré in Kelvin? (Answer: 253.15 K)
Key Takeaways
- K = (°Ré × 1.25) + 273.15.
- 0°Ré = 273.15 K, 80°Ré = 373.15 K.
Reaumur to Kelvin Conversion Formula
K = °Ré × 5/4 + 273.15
1 Reaumur = 274.4000000 kelvin
1 kelvin = -217.7200000 Reaumur
Frequently Asked Questions
How many kelvin are in 1 Reaumur?
1 Reaumur equals 274.40000 kelvin. Note: Temperature conversion uses a formula, not simple multiplication.
How do I convert Reaumur to kelvin?
Use the conversion formula shown above. For example, 279.40 kelvin equals 5 Reaumur. Temperature scales have different zero points, so a formula (not simple multiplication) is required.
How do I convert kelvin to Reaumur?
Use the reverse formula. 1 kelvin equals -217.72000 Reaumur. See the formula section above for the exact equation.
What is 10 Reaumur in kelvin?
10 Reaumur is equal to 285.65000 kelvin.
What is 100 Reaumur in kelvin?
100 Reaumur is equal to 398.15000 kelvin.