How to convert Rankine to Fahrenheit
°F = °R − 459.67
Apply the operations in the order shown. This formula converts a Rankine temperature reading to Fahrenheit, not a temperature difference. The source reading must be at least 0 °R, the absolute-zero limit.
Worked examples
491.67 °R ≈ 32 °F
491.67 − 459.67 ≈ 32
Water’s familiar freezing reference near standard atmospheric pressure.
671.67 °R ≈ 212 °F
671.67 − 459.67 ≈ 212
Water’s familiar boiling reference near standard atmospheric pressure; actual boiling temperature changes with pressure.
Frequently asked questions
Can I use °R to °F for a temperature difference?
For an interval, use only the degree-size ratio and omit any offset. This calculator converts scale readings. Kelvin and Rankine start at absolute zero; Celsius and Fahrenheit have different zero points.