Convert Rankine to Fahrenheit
Live bidirectional calculator for Rankine (°R) and Fahrenheit (°F) with verified formula and conversion charts.
Temperature4 units
How the Calculation Works (Affine Transformation)
Subtract 459.67 from the Rankine temperature to convert from the absolute scale to Fahrenheit.
Rankine to Fahrenheit Conversion Table
Precomputed values for quick reference and printing.
| Rankine | Fahrenheit |
|---|---|
| 1 °R | -458.67 °F |
| 2 °R | -457.67 °F |
| 3 °R | -456.67 °F |
| 4 °R | -455.67 °F |
| 5 °R | -454.67 °F |
| 6 °R | -453.67 °F |
| 7 °R | -452.67 °F |
| 8 °R | -451.67 °F |
| 9 °R | -450.67 °F |
| 10 °R | -449.67 °F |
| 15 °R | -444.67 °F |
| 20 °R | -439.67 °F |
| 25 °R | -434.67 °F |
| 30 °R | -429.67 °F |
| 40 °R | -419.67 °F |
| 50 °R | -409.67 °F |
| 75 °R | -384.67 °F |
| 100 °R | -359.67 °F |
| Fahrenheit | Rankine |
|---|---|
| 1 °F | 460.67 °R |
| 2 °F | 461.67 °R |
| 3 °F | 462.67 °R |
| 4 °F | 463.67 °R |
| 5 °F | 464.67 °R |
| 6 °F | 465.67 °R |
| 7 °F | 466.67 °R |
| 8 °F | 467.67 °R |
| 9 °F | 468.67 °R |
| 10 °F | 469.67 °R |
| 15 °F | 474.67 °R |
| 20 °F | 479.67 °R |
| 25 °F | 484.67 °R |
| 30 °F | 489.67 °R |
| 40 °F | 499.67 °R |
| 50 °F | 509.67 °R |
| 75 °F | 534.67 °R |
| 100 °F | 559.67 °R |
About Rankine (°R)
The Rankine scale is an absolute temperature scale using Fahrenheit-sized degrees. 0 °R is absolute zero, and 491.67 °R is the freezing point of water.
History: Proposed by William John Macquorn Rankine in 1859. Used primarily in US engineering thermodynamics.
Common Uses: Thermodynamic calculations in US engineering, particularly in HVAC, combustion, and turbine analysis.
About Fahrenheit (°F)
The Fahrenheit scale sets 32 °F as the freezing point of water and 212 °F as the boiling point at standard atmospheric pressure, with 180 equal divisions between them.
History: Invented by Daniel Gabriel Fahrenheit in 1724. Originally based on three reference points: brine freezing, water freezing, and human body temperature.
Common Uses: Everyday temperature measurement in the United States, Belize, the Cayman Islands, and Palau.
❓ Frequently Asked Questions
What is 1 °R in °F?
1 Rankine (°R) is equal to -458.67 Fahrenheit (°F). Unlike linear units, temperature scales have differing zero offsets.
What is the formula to convert Rankine to Fahrenheit?
The formula is: °F = °R - 459.67. Subtract 459.67 from the Rankine temperature to convert from the absolute scale to Fahrenheit.
How do I convert 1 °R to °F manually?
To convert 1 °R to °F: apply the formula °F = °R - 459.67. Substituting gives: 1 - 459.67 = -458.67 °F.