\( T_{°R} \;=\; (273.15° + T_ { °C} ) \cdot 1.8 \)
\( T_{°R} \;=\; 459.67° + T_ { °F} \)
\( T_{°R} \;=\; ( T_{°K} ) \cdot 1.8 \)
Rankine, abbreviated as R, is a unit of temperature used in the US engineering field. 0 is set at absolute zero.