Réaumur to Delisle Converter

Enter the temperature in Réaumur in the top field, then press the 'Convert' button. Alternatively, you can convert from Delisle to Réaumur by entering the value in Delisle in the bottom field and press 'Convert'.

Réaumur to Delisle Conversion Formula


Reverse formula and conversion (Delisle to Réaumur)


The Réaumur scale, named after René Antoine Ferchault de Réaumur places water freezing point at 0 °Ré and water boiling point at 80 °Ré.


The Delisle scale places the water freezing point at 150 °D, and water boiling point at 0 °D. Therefore at higher Delisle numbers correspond lower temperatures. It was invented by Joseph-Nicolas Delisle, a French astronomer.