# Réaumur to Delisle

Calculates the Delisle temperature from the given Réaumur scale value

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## Réaumur to Delisle

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 Delisle temperature scale was defined by Joseph-Nicolas Delisle in 1732. This measure adjust 0 at the point of the boiling water and 150 as the freezing point of the water. The unit is represented by °D (and sometimes as °De) after the value.

The Delisle temperature scale values are calculated from Réaumur using the formula $$(80 - Réaumur) × {15 \over 8}$$