Convert Rankine to Fahrenheit
Fahrenheit = Rankine − 459.67. Type any temperature below to convert rankine to fahrenheit both ways — it runs entirely in your browser.
Rankine to Fahrenheit formula
Temperature scales have different zero points, so the conversion is a multiply-and-add, not a single ratio:
Fahrenheit = Rankine − 459.67
To go the other way, Rankine = Fahrenheit + 459.67.
Worked example
Convert 540 °R to fahrenheit:
= 540 − 459.67 = 80.33 °F.
Common temperatures in Rankine and Fahrenheit
| Reference point | Rankine (°R) | Fahrenheit (°F) |
|---|---|---|
| Absolute zero | 0 | -459.67 |
| Freezing point of water | 491.67 | 32 |
| Refrigerator | 498.87 | 39.2 |
| Room temperature | 529.47 | 69.8 |
| Normal human body temperature | 558.27 | 98.6 |
| A hot summer day | 572.67 | 113 |
| Boiling point of water (sea level) | 671.67 | 212 |
About the Rankine and Fahrenheit scales
Rankine: The Rankine scale starts at absolute zero like Kelvin but uses the Fahrenheit-sized degree (0 °R = −459.67 °F). It appears in some US engineering and thermodynamics work.
Fahrenheit: Fahrenheit puts water’s freezing point at 32° and its boiling point at 212° — a 180-degree span. It is the everyday scale in the United States and a few other territories.
Frequently asked questions
- What is 540 °R in Fahrenheit?
- 540 °R = 80.33 °F.
- How do I convert Rankine to Fahrenheit?
- Use fahrenheit = rankine − 459.67. For example, 540 °R → 80.33 °F.
- How do I convert Fahrenheit back to Rankine?
- Reverse it: rankine = fahrenheit + 459.67.
- Why isn't converting Rankine to Fahrenheit just multiplication?
- Because the two scales start their zero at different temperatures, so after scaling by 1 you also subtract 459.67. Skipping that constant is the most common temperature-conversion mistake.