How to convert Fahrenheit to Rankine
°R = °F + 459.67
Apply the operations in the order shown. This formula converts a Fahrenheit temperature reading to Rankine, not a temperature difference. The source reading must be at least -459.67 °F, the absolute-zero limit.
Worked examples
32 °F ≈ 491.67 °R
32 + 459.67 ≈ 491.67
Water’s familiar freezing reference near standard atmospheric pressure.
212 °F ≈ 671.67 °R
212 + 459.67 ≈ 671.67
Water’s familiar boiling reference near standard atmospheric pressure; actual boiling temperature changes with pressure.
Frequently asked questions
Can I use °F to °R 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.