30 Rankine to Réaumur
Quick answer
30 Rankine (°R) equals
-205.186667 °Ré
To convert 30 Rankines to Réaumurs, multiply by -218.0755555556. Therefore, 30 Rankine (°R) equals -205.186667 Réaumur (°Ré).
Formula: °Ré = (°R - 491.67) × 4/9. Calculation: -205.186667 °Ré. Reverse: °R = ((°Ré × 5/4) + 273.15) × 9/5.
Convert Rankine (°R) to Réaumur (°Ré) online with our free unit converter. Calculated using formula: °Ré = (°R - 491.67) × 4/9. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Rankine to Réaumur
- Step 1 — start with the formula. °Ré = (°R - 491.67) × 4/9
- Step 2 — substitute your figure. Apply the formula to 30 °R.
- Step 3 — read the result. 30 °R = -205.186667 °Ré
- Step 4 — check it in reverse. °R = ((°Ré × 5/4) + 273.15) × 9/5 returns 30 °R, which matches the figure you started with.
Temperature Converter
5 units available
30 °R = -205.186667 °Ré
Formula:
°Ré = (°R - 491.67) × 4/9With your value: 30 °R = -205.18666667 °Ré
Other Rankine to Réaumur conversions
Rankine to Réaumur Conversion Table
| Rankine (°R) | Réaumur (°Ré) |
|---|---|
| 0.5 | -218.297778 |
| 1 | -218.075556 |
| 2 | -217.631111 |
| 5 | -216.297778 |
| 10 | -214.075556 |
| 15 | -211.853333 |
| 20 | -209.631111 |
| 25 | -207.408889 |
| 50 | -196.297778 |
| 100 | -174.075556 |
| 250 | -107.408889 |
| 500 | 3.702222 |
| 1000 | 225.924444 |
Réaumur to Rankine Conversion Table
| Réaumur (°Ré) | Rankine (°R) |
|---|---|
| 0.5 | 492.795 |
| 1 | 493.92 |
| 2 | 496.17 |
| 5 | 502.92 |
| 10 | 514.17 |
| 15 | 525.42 |
| 20 | 536.67 |
| 25 | 547.92 |
| 50 | 604.17 |
| 100 | 716.67 |
| 250 | 1,054.17 |
| 500 | 1,616.67 |
| 1000 | 2,741.67 |
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.
Rankine (°R)
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
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
How to Convert Rankine to Réaumur
This conversion uses an offset formula, so it cannot be described by a single multiplication factor.
Formula: °Ré = (°R - 491.67) × 4/9
Reverse: °R = ((°Ré × 5/4) + 273.15) × 9/5
Step-by-Step Example
- Start with your value in Rankine. For example: 5 °R
- Apply °Ré = (°R - 491.67) × 4/9
- The result is: -216.297778 °Ré
Rankine and Réaumur Relationship
This calculation facilitates standardized conversion between recognized units of temperature. Unlike simple multiplicative factors, this conversion follows an affine calculation model: °Ré = (°R - 491.67) × 4/9. Understanding the relationship between Rankine and Réaumur is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Rankine
The Rankine scale is an absolute temperature scale using Fahrenheit-sized degrees: 0 °R is absolute zero and water freezes at 491.67 °R.
Common uses of Rankine: US thermodynamics, combustion engineering.
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.
Frequently Asked Questions
- What is 30 Rankine in Réaumur?
- 30 Rankine equals -205.186667 Réaumur.
- How many Réaumurs are in 1 Rankine?
- There are exactly -218.0755555556 Réaumurs in 1 Rankine.
- What is the formula to convert Rankine to Réaumur?
- The formula to convert Rankine to Réaumur is: °Ré = (°R - 491.67) × 4/9. For example, to convert 10 Rankines to Réaumurs, you would apply the formula to 10.
- What is a Rankine?
- The Rankine scale is an absolute temperature scale using Fahrenheit-sized degrees: 0 °R is absolute zero and water freezes at 491.67 °R.
- 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 are the common uses of Rankine?
- The Rankine is commonly used in US thermodynamics, combustion engineering.
Related Temperature Conversions
Cite this page
UnitConvertLab. (2026). 30 Rankine to Réaumur. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/30-rankine-to-reaumur