Temperature
°Rto°F
Convert degrees Rankine (°R) to degrees Fahrenheit (°F).
Converter
°R
Accepts numbers or expressions, e.g. 150 + 14.7
Result
°F
Rendered to 6 significant figures.
Formula
Formula
°F = °R − 459.67
Temperature conversions involve different scale zero-points, so a single multiplicative factor does not exist. Apply the formula to each value individually.
Worked example
Convert 540 °R to °F.
- 01540 − 459.67 = 80.3300 °F
Result540 °R = 80.33 °F
Conversion table
| °R | °F |
|---|---|
| 0 | -459.67 |
| 100 | -359.67 |
| 300 | -159.67 |
| 491.67 | 32 |
| 540 | 80.33 |
| 600 | 140.33 |
| 800 | 340.33 |
| 1000 | 540.33 |
| 1500 | 1040.3 |
| 2000 | 1540.3 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the formula to convert °R to °F?
Temperature conversions are not a single multiplier because the scales have different zero points. Use °F = °R − 459.67 to convert any value of °R to °F.
How do I convert 1 °R to °F?
1 °R corresponds to -458.67 °F. Apply the formula °F = °R − 459.67 to your value.
How do I convert °F back to °R?
Use the inverse formula. For example, to go from °F back to °R, rearrange °F = °R − 459.67 for °R. See the °F to °R page for the direct formula.
When would I need to convert degree Rankine to degree Fahrenheit?
Temperature scale conversions are routine in process engineering: instrumentation often reads in °C or °F, while thermodynamic calculations (gas laws, enthalpy) require absolute units (K or °R). Always use absolute units for any equation involving a ratio of temperatures.
Is the conversion exact?
Yes — the temperature scale relationships are exact by definition (the Celsius–Kelvin offset is 273.15 exactly; the Fahrenheit–Rankine offset is 459.67 exactly).