Convert between Fahrenheit and Rankine. Widely used in thermodynamics and engineering.
Last updated: March 2026 | By Patchworkr Team
Rankine is the absolute temperature version of Fahrenheit. It uses the same degree size as Fahrenheit, but starts at absolute zero instead of an arbitrary reference point.
While Fahrenheit uses a relative scale (based on water freezing/boiling), Rankine is an absolute scale. This makes it ideal for thermodynamic calculations in US engineering contexts.
Absolute zero is 0°R, which equals −459.67°F or −273.15°C. This is the lowest possible temperature where all molecular motion stops.
The conversion between Fahrenheit and Rankine is the simplest of all temperature conversions—just add or subtract 459.67.
Simply add 459.67. This is already the simplest possible form—Rankine is just Fahrenheit shifted to start at absolute zero.
Subtract 459.67 to return to Fahrenheit scale.
Convert 68°F to Rankine (step-by-step)
Step 1: Take the Fahrenheit value
Step 2: Add 459.67
| Fahrenheit | Rankine |
|---|---|
| -459.67 °F | 0 °R |
| -40 °F | 419.67 °R |
| 0 °F | 459.67 °R |
| 32 °F | 491.67 °R |
| 50 °F | 509.67 °R |
| 68 °F | 527.67 °R |
| 77 °F | 536.67 °R |
| 98.6 °F | 558.27 °R |
| 122 °F | 581.67 °R |
| 212 °F | 671.67 °R |
Add 459.67 to the Fahrenheit value. It's the simplest temperature conversion.
-459.67°F, which equals 0°R.
It's an absolute scale for thermodynamics in US engineering contexts.
Mainly in US aerospace and certain engineering fields.
491.67°R (freezing point of water).
No, Rankine starts at absolute zero.
Same concept, but Rankine uses Fahrenheit-sized degrees.
671.67°R (boiling point of water).
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