# Kelvin to Réaumur

Calculates the Réaumur temperature from the given Kelvin scale value

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## Kelvin to Réaumur

The Kelvin temperature scale was described by William Thomson, 1st Baron Kelvin in his paper of 1848 On an Absolute Thermometric Scale the idea of starting to measure the temperature from the zero absolute or where the atomic particles just stop moving. The letter K represents its unit after the value.

The Réaumur temperature scale was proposed by René Antoine Ferchault de Réaumur in 1730, and it is based on the water tristate as well as Celsius, placing the 0 at the point when the liquid water freezes, and the value of 80 at the point when the liquid water boils. Its unit is represented with °Ré, with °Re, and sometimes with °r after the value.

The Réaumur temperature scale values are calculated from Kelvin using the formula $$(Kelvin - 273.15) × {4 \over 5}$$