Convert Fahrenheit to Rankine
Rankine = Fahrenheit + 459.67. Type any temperature below to convert fahrenheit to rankine both ways — it runs entirely in your browser.
Fahrenheit to Rankine formula
Temperature scales have different zero points, so the conversion is a multiply-and-add, not a single ratio:
Rankine = Fahrenheit + 459.67
To go the other way, Fahrenheit = Rankine − 459.67.
Worked example
Convert 98.6 °F to rankine:
= 98.6 + 459.67 = 558.27 °R.
Common temperatures in Fahrenheit and Rankine
| Reference point | Fahrenheit (°F) | Rankine (°R) |
|---|---|---|
| Absolute zero | -459.67 | 0 |
| Freezing point of water | 32 | 491.67 |
| Refrigerator | 39.2 | 498.87 |
| Room temperature | 69.8 | 529.47 |
| Normal human body temperature | 98.6 | 558.27 |
| A hot summer day | 113 | 572.67 |
| Boiling point of water (sea level) | 212 | 671.67 |
About the Fahrenheit and Rankine scales
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.
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.
Frequently asked questions
- What is 98.6 °F in Rankine?
- 98.6 °F = 558.27 °R.
- How do I convert Fahrenheit to Rankine?
- Use rankine = fahrenheit + 459.67. For example, 98.6 °F → 558.27 °R.
- How do I convert Rankine back to Fahrenheit?
- Reverse it: fahrenheit = rankine − 459.67.
- Why isn't converting Fahrenheit to Rankine just multiplication?
- Because the two scales start their zero at different temperatures, so after scaling by 1 you also add 459.67. Skipping that constant is the most common temperature-conversion mistake.