Rømer to Réaumur Converter

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

Rømer to Réaumur Conversion Formula


Reverse formula and conversion (Réaumur to Rømer)


The Rømer scale owes its name to it's inventor Ole Christensen Rømer. A Rømer degree is equivalent to 40/21 of a Celsius degree. It places the water freezing point at 7.5 °Rø.


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