How to Convert Rankine to Celsius (°R to °C)
Temperature conversions help with American oven recipes in Fahrenheit, weather apps set to the wrong unit, and science homework that uses kelvin. This guide shows how to convert rankine into celsius by hand, with examples and a quick-reference table.
The conversion
Temperature scales have different zero points, so you cannot use a single multiplier. Convert through kelvin: °R converted through kelvin: ((°R*5/9)-273.15).
°R converted through kelvin: ((°R*5/9)-273.15)
Worked examples
- 15 °R = -264.8167 °C
- 32 °R = -255.3722 °C
- 100 °R = -217.5944 °C
Rankine to Celsius table
| Rankine | Celsius |
|---|---|
| -40 °R | -295.3722 °C |
| -10 °R | -278.7056 °C |
| 0 °R | -273.15 °C |
| 10 °R | -267.5944 °C |
| 20 °R | -262.0389 °C |
| 25 °R | -259.2611 °C |
| 30 °R | -256.4833 °C |
| 37 °R | -252.5944 °C |
| 50 °R | -245.3722 °C |
| 100 °R | -217.5944 °C |
| 200 °R | -162.0389 °C |
Common questions
Is °R to °C exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Celsius to Rankine converter.
Mistakes to avoid
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Background
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the Rankine to Celsius Converter or browse all temperature converters.
Run your own numbers: Rankine to Celsius Converter