Réaumur (°Re) – The Historic Scientific Scale

The Réaumur scale was once widely used in Europe, particularly in France and Germany. It is based on the freezing (0°Re) and boiling (80°Re) points of water.

History of the Réaumur Scale

Created by René Antoine Ferchault de Réaumur in 1731, the scale was primarily used in scientific and industrial applications until it was replaced by the Celsius system.

Usage and Applications

  • Historic Applications:Used in 18th-19th century Europe.
  • Food Industry:Some cheese-making and confectionery recipes still use Réaumur.

Conversion Formulas

  • To Celsius: °Re × 5/4
  • To Fahrenheit: (°Re × 9/4) + 32
  • To Kelvin: (°Re × 5/4) + 273.15
  • To Rankine: (°Re × 9/4) + 491.67