Temperature
°Fto°R
Convert degrees Fahrenheit (°F) to degrees Rankine (°R).
Converter
°F
Accepts numbers or expressions, e.g. 150 + 14.7
Result
°R
Rendered to 6 significant figures.
Formula
Formula
°R = °F + 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 100 °F to °R.
- 01100 + 459.67 = 559.6700 °R
Result100 °F = 559.67 °R
Conversion table
| °F | °R |
|---|---|
| -40 | 419.67 |
| 0 | 459.67 |
| 32 | 491.67 |
| 50 | 509.67 |
| 68 | 527.67 |
| 100 | 559.67 |
| 200 | 659.67 |
| 300 | 759.67 |
| 500 | 959.67 |
| 1000 | 1459.7 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the formula to convert °F to °R?
Temperature conversions are not a single multiplier because the scales have different zero points. Use °R = °F + 459.67 to convert any value of °F to °R.
How do I convert 1 °F to °R?
1 °F corresponds to 460.67 °R. Apply the formula °R = °F + 459.67 to your value.
How do I convert °R back to °F?
Use the inverse formula. For example, to go from °R back to °F, rearrange °R = °F + 459.67 for °F. See the °R to °F page for the direct formula.
When would I need to convert degree Fahrenheit to degree Rankine?
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).