Degrees Rankine to Degrees Fahrenheit
Type a value in Degrees Rankine and get the result in Degrees Fahrenheit, calculated exactly.
20 Degrees Rankine = −439.67 Degrees Fahrenheit
Exact factorThis result is exact.
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Turn either dial: drag it, use the arrow keys, or scroll while it has focus. Both cover the same range.
Range 0 – 50 °R = -459.67 – -409.67 °F
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Formula
°F = °R × 1 + −459.67
To convert Degrees Rankine to Degrees Fahrenheit, multiply the value by 1, then add −459.67.
Worked examples
- 0 °R = −459.67 °F
- 20 °R = −439.67 °F
- 100 °R = −359.67 °F
This factor is exact by definition.
Conversion table
| Degrees Rankine (°R) | Degrees Fahrenheit (°F) |
|---|---|
| −40 | — |
| −30 | — |
| −20 | — |
| −10 | — |
| 0 | −459.67 |
| 5 | −454.67 |
| 10 | −449.67 |
| 15 | −444.67 |
| 20 | −439.67 |
| 25 | −434.67 |
| 30 | −429.67 |
| 35 | −424.67 |
| 37 | −422.67 |
| 40 | −419.67 |
| 50 | −409.67 |
| 60 | −399.67 |
| 70 | −389.67 |
| 80 | −379.67 |
| 90 | −369.67 |
| 100 | −359.67 |
| 150 | −309.67 |
| 200 | −259.67 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Degrees Fahrenheit to Degrees Rankine
| Degrees Fahrenheit (°F) | Degrees Rankine (°R) |
|---|---|
| −40 | 419.67 |
| −30 | 429.67 |
| −20 | 439.67 |
| −10 | 449.67 |
| 0 | 459.67 |
| 5 | 464.67 |
| 10 | 469.67 |
| 15 | 474.67 |
| 20 | 479.67 |
| 25 | 484.67 |
| 30 | 489.67 |
| 35 | 494.67 |
| 37 | 496.67 |
| 40 | 499.67 |
| 50 | 509.67 |
| 60 | 519.67 |
| 70 | 529.67 |
| 80 | 539.67 |
| 90 | 549.67 |
| 100 | 559.67 |
| 150 | 609.67 |
| 200 | 659.67 |
Unit definitions
- Degrees Rankine °R
- An absolute scale with Fahrenheit-sized degrees: exactly 5/9 of a kelvin, starting at absolute zero.
- Degrees Fahrenheit °F
- Water freezes at 32 °F and boils at 212 °F; one degree is 5/9 of a kelvin.
Questions people ask
Degrees Rankine to Degrees Fahrenheit: what is the conversion factor?
One °R is −458.67 °F.
How do I convert Degrees Rankine to Degrees Fahrenheit?
Use the formula above. For example, 20 °R = −439.67 °F.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.