Rankine

The Rankine (symbol R) is the temperature scale that is defined by measuring degrees Fahrenheit above absolute zero, therefore it has no negative values. This scale was proposed by the Scottish physicist and engineer William Rankine in 1859.

The Rankine degree has its absolute zero point at −459.67 °F, and the degree intervals are identical to the Fahrenheit degree interval.

R=F+459,67{displaystyle R=F+459{,}67,}

F=R− − 459,67{displaystyle F=R-459{,}67,}

R=95C+491,67{displaystyle R={frac {9}{5}}C+491{,}67,}

Zero Rankine (0 R) equals −273.15 °C or 0 K. To convert from Kelvin to Rankin multiply by a factor of 9/5:

R=95K{displaystyle R={frac {9}{5}}K,}

K=59R{displaystyle K={frac {5}{9}R,}

R=95(C+273,15){displaystyle R={frac {9}{5}}(C+273{,}15),}

C=59(R− − 491,67){displaystyle C={frac {5}{9}}(R-491{,}67),}

It is commonly used in the US as a measure of thermodynamic temperature.