Temperature Scales

There are different temperature scales in use which are given below:

Centigrade or celcius scale:

Lower fixed point =0$°$C

Upper fixed point =100$°$C

Fahrenheit scale

Lower fixed point =32$°$F

Upper fixed point =212$°$F

Reaumer scale

Lower fixed point =0$°$R

Upper fixed point =80$°$R

absolute or kelvin scale

Lower fixed point =0 K

Upper fixed point =100 K

Rankine scale

Lower fixed point =492 R

Upper fixed point =672 R

Relation between different temperature scale

$\frac{C-0}{100-0}=\frac{F-32}{212-32}=\frac{R-0}{80-0}=\frac{K-273}{373-273}=\frac{Rn-492}{672-492}$

$\frac{C}{100}=\frac{F-32}{100}=\frac{R}{80}=\frac{K-273}{100}=\frac{Rn-492}{180}$

Universal formula for any temperature scale

$\frac{S-lowerfixedpoint}{upperfixedpoint-lowerfixedpoint}=\frac{S^{\prime }-lowerfixedpoint}{upperfixedpoint-lowerfixedpoint}$