Rankine to Celsius converter (°R to °C)
Convert Rankine (°R) to Celsius (°C) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert Rankine to Celsius
0 degrees Rankine is equal to −273.15 degrees Celsius.
T(°C) = (T(°R) − 459.67) × 5÷9
Subtract 459.67 from Rankine (to get Fahrenheit), then multiply by 5÷9:
Example: Convert 527.67 °R to Celsius:
T(°C) = (527.67 − 459.67) × 5÷9 = 20°C
What is a Rankine?
The Rankine (°R) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Celsius?
Celsius (°C) is the metric temperature scale. Water freezes at 0 °C and boils at 100 °C at standard pressure.
This page converts temperature from Rankine into Celsius. Use the formula above for the exact relationship between the two units.
How this calculator works
The form on this page is a Rankine-to-Celsius converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the °C result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many °C are in 1 °R?
Use the formula in the section above. Temperature and logarithmic units are not a single multiply-by-a-constant step.
How do I convert Rankine to Celsius?
Subtract 459.67 from Rankine (to get Fahrenheit), then multiply by 5÷9:
Is this °R to °C converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.