How to Convert Rankine to Fahrenheit (°R to °F)
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 fahrenheit 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)*9/5+32).
°R converted through kelvin: (((°R*5/9)-273.15)*9/5+32)
Worked examples
- 15 °R = -444.67 °F
- 32 °R = -427.67 °F
- 100 °R = -359.67 °F
Rankine to Fahrenheit table
| Rankine | Fahrenheit |
|---|---|
| -40 °R | -499.67 °F |
| -10 °R | -469.67 °F |
| 0 °R | -459.67 °F |
| 10 °R | -449.67 °F |
| 20 °R | -439.67 °F |
| 25 °R | -434.67 °F |
| 30 °R | -429.67 °F |
| 37 °R | -422.67 °F |
| 50 °R | -409.67 °F |
| 100 °R | -359.67 °F |
| 200 °R | -259.67 °F |
Common questions
Is °R to °F 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 Fahrenheit to Rankine converter.
Mistakes to avoid
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
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.
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
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
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 everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
For any value, use the Rankine to Fahrenheit Converter or browse all temperature converters.
Run your own numbers: Rankine to Fahrenheit Converter