# Rankine to Celsius

Calculates the Rankine temperature from the given Celsius or centigrade scale value

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## Rankine to Celsius

The Rankine temperature scale was proposed by William John Macquorn Rankine in 1859 similarly to Kelvin temperature scale. The zero absolute at Rankine scale is also 0 K, and degree of Rankine is the same than Fahrenheit degree. The Rankine is represented as °R after the value, and sometimes like °RA.

The Celsius or centigrade temperature scale is based on the water tristate, placing the 0 at the point when the liquid water becomes ice, and the 100 at the point when the liquid water becomes gas, both at 1 atm pressure. Its unit is represented with ℃ after the value.

The Celsius values are calculated from Rankine values using the formula $$(Rankine - 491.67) × {5 \over 9}$$