Convert Rankine to Celsius
Instantly convert Rankine (°R) to Celsius (°C) with our free online calculator.
Formula: °R to °C — (°R − 491.67) × 5/9
Reference Table
| Rankine (°R) | Celsius (°C) |
|---|---|
| 1 | -272.594 |
| 5 | -270.372 |
| 10 | -267.594 |
| 25 | -259.261 |
| 50 | -245.372 |
| 100 | -217.594 |
How to Convert Rankine to Celsius
Formula
To convert Rankine (°R) to Celsius (°C): (°R − 491.67) × 5/9
Step-by-Step
- Start with your value in Rankine (°R).
- (°R − 491.67) × 5/9 to perform the conversion.
- The result is your value expressed in Celsius (°C).
Conversion Factor
1 °R = -272.594 °C
Reverse Factor
1 °C = 493.47 °R
Worked Example
Convert 25 Rankine to Celsius: 25 °R = -259.261 °C
About Rankine (°R)
An absolute temperature scale proposed by Scottish engineer William Rankine in 1859, using the Fahrenheit degree interval but anchored at absolute zero (0°R = −459.67°F). Rankine is primarily used in US engineering — combustion analysis, HVAC thermodynamics, rocket propulsion, and steam-cycle calculations — where both absolute referencing and Fahrenheit-compatible arithmetic matter. It's the temperature analog of the US customary system the way Kelvin is the metric equivalent, and appears in most US mechanical-engineering textbooks.
About Celsius (°C)
A temperature scale on which water freezes at 0° and boils at 100° under standard atmospheric pressure, devised by Swedish astronomer Anders Celsius in 1742. Celsius is the global standard for weather forecasts, cooking, human body temperature (normal ~37°C), and most scientific measurement outside the US. Because its degree interval is identical to the kelvin, Celsius is the everyday face of SI temperature: scientists and laypeople alike use it without any conversion penalty.
Quick Facts
- 1 Rankine equals -272.594 Celsius
- 1 Celsius equals 493.47 Rankine
- Rankine is a unit of temperature
- Celsius is a unit of temperature
- This conversion is commonly used in weather forecasting, cooking, scientific experiments, and HVAC
- The Rankine belongs to the imperial system
- The Celsius belongs to the metric system
Common Rankine to Celsius Conversions
| Rankine (°R) | Celsius (°C) |
|---|---|
| -40 | -295.372 |
| -20 | -284.261 |
| -10 | -278.706 |
| 0 | -273.15 |
| 5 | -270.372 |
| 10 | -267.594 |
| 15 | -264.817 |
| 20 | -262.039 |
| 25 | -259.261 |
| 30 | -256.483 |
| 35 | -253.706 |
| 37 | -252.594 |
| 40 | -250.928 |
| 50 | -245.372 |
| 60 | -239.817 |
| 70 | -234.261 |
| 80 | -228.706 |
| 90 | -223.15 |
| 100 | -217.594 |
| 150 | -189.817 |
| 200 | -162.039 |
Understanding Rankine
The Rankine (symbol: °R) is a unit of temperature. An absolute temperature scale proposed by Scottish engineer William Rankine in 1859, using the Fahrenheit degree interval but anchored at absolute zero (0°R = −459.67°F). Rankine is primarily used in US engineering — combustion analysis, HVAC thermodynamics, rocket propulsion, and steam-cycle calculations — where both absolute referencing and Fahrenheit-compatible arithmetic matter. It's the temperature analog of the US customary system the way Kelvin is the metric equivalent, and appears in most US mechanical-engineering textbooks.
It belongs to the imperial measurement system.
Rankine are commonly used in weather forecasting, cooking, scientific experiments, and HVAC.
Understanding Celsius
The Celsius (symbol: °C) is a unit of temperature. A temperature scale on which water freezes at 0° and boils at 100° under standard atmospheric pressure, devised by Swedish astronomer Anders Celsius in 1742. Celsius is the global standard for weather forecasts, cooking, human body temperature (normal ~37°C), and most scientific measurement outside the US. Because its degree interval is identical to the kelvin, Celsius is the everyday face of SI temperature: scientists and laypeople alike use it without any conversion penalty.
It belongs to the metric measurement system.
Celsius are commonly used in weather forecasting, cooking, scientific experiments, and HVAC.
Why Convert Rankine to Celsius?
Converting between Rankine and Celsius is essential for a variety of everyday and professional tasks. International recipes list oven temperatures in different scales, weather reports from other countries use unfamiliar units, and scientists must reconcile data recorded under different conventions. Medical professionals also compare body temperature readings that may be reported in different units depending on the country or device.
Frequently Asked Questions
How do I convert Rankine to Celsius?
An absolute temperature scale proposed by Scottish engineer William Rankine in 1859, using the Fahrenheit degree interval but anchored at absolute zero (0°R = −459. To convert Rankine to Celsius, (°R − 491.67) × 5/9. For example, 25 °R equals -259.261 °C.
How many Celsius are in 1 Rankine?
There are -272.594 Celsius in 1 Rankine.
How many Rankine are in 1 Celsius?
There are 493.47 Rankine in 1 Celsius.
What is the formula for Rankine to Celsius conversion?
The formula is: (°R − 491.67) × 5/9. This means 1 °R = -272.594 °C.
Is a Rankine bigger than a Celsius?
Yes. One Rankine is larger than one Celsius because 1 °R equals -272.594 °C, which is less than 1.
When do you need to convert between Rankine and Celsius?
A temperature scale on which water freezes at 0° and boils at 100° under standard atmospheric pressure, devised by Swedish astronomer Anders Celsius in 1742. Rankine and Celsius are both temperature units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.