Reaumur to Rankine Converter
Enter the value that you want to convert Reaumur (°r) to Rankine (°R) or Rankine to Reaumur.Also written as °R to °R conversion.
1 Reaumur = 493.9200000 Rankine
Formula: °R = (°Ré × 5/4 + 273.15) × 9/5
°R to °R — Reaumur to Rankine
10 Reaumur = 514.17000 Rankine
Popular Temperature Converters:
Temperature Scale Comparison Chart
Reaumur vs Rankine
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 Rankine Explained
The Rankine scale is the Fahrenheit-based absolute temperature scale, starting at absolute zero (0°R = −459.67°F).
Developed by Scottish engineer William Rankine in 1859, the Rankine scale (°R) is used primarily in American engineering for thermodynamic calculations. It relates to Fahrenheit as Kelvin relates to Celsius — same degree size but offset to absolute zero. The Rankine cycle (steam power plant efficiency) and some US aerospace engineering calculations use this scale. To convert: °R = °F + 459.67.
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 Rankine metric conversion table
| 0.01 °r | = | 491.69250 °R |
| 0.1 °r | = | 491.89500 °R |
| 1 °r | = | 493.92000 °R |
| 2 °r | = | 496.17000 °R |
| 3 °r | = | 498.42000 °R |
| 4 °r | = | 500.67000 °R |
| 5 °r | = | 502.92000 °R |
| 6 °r | = | 505.17000 °R |
| 7 °r | = | 507.42000 °R |
| 8 °r | = | 509.67000 °R |
| 9 °r | = | 511.92000 °R |
| 10 °r | = | 514.17000 °R |
| 11 °r | = | 516.42000 °R |
| 12 °r | = | 518.67000 °R |
| 13 °r | = | 520.92000 °R |
| 14 °r | = | 523.17000 °R |
| 15 °r | = | 525.42000 °R |
| 16 °r | = | 527.67000 °R |
| 17 °r | = | 529.92000 °R |
| 18 °r | = | 532.17000 °R |
| 19 °r | = | 534.42000 °R |
| 20 °r | = | 536.67000 °R |
| 30 °r | = | 559.17000 °R |
| 40 °r | = | 581.67000 °R |
| 50 °r | = | 604.17000 °R |
| 60 °r | = | 626.67000 °R |
| 70 °r | = | 649.17000 °R |
| 80 °r | = | 671.67000 °R |
| 90 °r | = | 694.17000 °R |
| 100 °r | = | 716.67000 °R |
| 200 °r | = | 941.67000 °R |
| 300 °r | = | 1166.67000 °R |
| 400 °r | = | 1391.67000 °R |
| 500 °r | = | 1616.67000 °R |
| 600 °r | = | 1841.67000 °R |
| 700 °r | = | 2066.67000 °R |
| 800 °r | = | 2291.67000 °R |
| 900 °r | = | 2516.67000 °R |
| 1000 °r | = | 2741.67000 °R |
How to Convert °R to °R (Reaumur to Rankine)?
We can convert Reaumur to Rankine by using an example.
Example:
Convert 20 Reaumur to Rankine?
We know 1 Reaumur = 493.9200000 Rankine; 1 Rankine = -218.0755556 Reaumur.
20 Reaumur = ___°R
20 × 493.9200000 = 536.67000 °R (we know 1 Reaumur = 493.9200000 Rankine)
Answer:
20 Reaumur = 536.67000 Rankine
Réaumur to Rankine Conversion
Formula: °R = (°Ré × 9/4) + 491.67:
- Multiply Réaumur by 9/4 (2.25).
- Add 491.67.
- The result is Rankine.
Solved Examples
Question 1: Convert 80°Ré to Rankine.
Solution:
°R = (80 × 2.25) + 491.67
= 180 + 491.67
Answer: 80°Ré = 671.67°R
Question 2: Convert 0°Ré to Rankine.
Solution:
°R = (0 × 2.25) + 491.67
Answer: 0°Ré = 491.67°R
Practice Questions
Try solving these on your own to test your understanding:
- Convert 40°Ré to Rankine. (Answer: 581.67°R)
- What is -16°Ré in Rankine? (Answer: 455.67°R)
Key Takeaways
- °R = (°Ré × 9/4) + 491.67.
- 0°Ré = 491.67°R, 80°Ré = 671.67°R.
Reaumur to Rankine Conversion Formula
°R = (°Ré × 5/4 + 273.15) × 9/5
1 Reaumur = 493.9200000 Rankine
1 Rankine = -218.0755556 Reaumur
Frequently Asked Questions
How many Rankine are in 1 Reaumur?
1 Reaumur equals 493.92000 Rankine. Note: Temperature conversion uses a formula, not simple multiplication.
How do I convert Reaumur to Rankine?
Use the conversion formula shown above. For example, 502.92 Rankine equals 5 Reaumur. Temperature scales have different zero points, so a formula (not simple multiplication) is required.
How do I convert Rankine to Reaumur?
Use the reverse formula. 1 Rankine equals -218.07556 Reaumur. See the formula section above for the exact equation.
What is 10 Reaumur in Rankine?
10 Reaumur is equal to 514.17000 Rankine.
What is 100 Reaumur in Rankine?
100 Reaumur is equal to 716.67000 Rankine.