Celsius To Reaumur (°C to °Ré) Converter

Welcome to our Celsius to Reaumur converter! This handy tool allows you to quickly and easily convert temperatures between these two historical scales. While Celsius (°C) is a widely used standard today, the Reaumur scale (°Ré) holds a significant place in scientific history, particularly in Europe.

Let’s delve into what these units represent. The Celsius scale, also known as centigrade, defines 0°C as the freezing point of water and 100°C as the boiling point of water at standard atmospheric pressure. The Reaumur scale, developed by René Antoine Ferchault de Réaumur in 1730, sets the freezing point of water at 0°Ré and the boiling point of water at 80°Ré. This means that a 1°C change corresponds to a 0.8°Ré change.

Converting from Celsius to Reaumur is a straightforward process. Since the Reaumur scale has 80 degrees between the freezing and boiling points of water compared to Celsius’s 100 degrees, the conversion factor is 4/5 or 0.8. Therefore, to convert a temperature in Celsius (°C) to Reaumur (°Ré), you simply multiply the Celsius value by 4/5. The formula is: °Ré = °C × 4/5.