Convert Réaumur to Celsius

Free Réaumur to Celsius Temperature Converter

Convert Réaumur (°Re) to Celsius (°C) instantly using this simple and accurate tool. The Réaumur scale, once popular in 18th and 19th-century Europe, is now a historical curiosity, but remains relevant in academic and scientific literature.

Whether you're exploring old engineering texts, brewing references, or cheese-making temperatures, this converter provides fast and reliable conversion between Réaumur and Celsius values.

Réaumur to Celsius Formula

Use the formula:
°C = °Re × 1.25

Example conversions:

• 0 °Re = 0 °C
• 40 °Re = 50 °C
• 80 °Re = 100 °C

The scale is linear, with 0 °Re set at freezing and 80 °Re at boiling, just like 0–100 °C in Celsius.

Why Use This Réaumur to Celsius Converter?

• 📏 Instant and precise conversion
• 📚 Ideal for education, brewing, and food science
• 🔁 Supports reverse conversion: °C ⇄ °Re
• 📱 Fully responsive on all screen sizes
• 💡 Perfect for trivia, academia, and old-world references

History of the Réaumur Scale

The scale was introduced by French scientist Réaumur in 1730. It gained popularity in France, Germany, and Russia but was later replaced by the more practical Celsius scale. Its main use today is historical and cultural — particularly in food and fermentation sciences.

Convert Celsius to Réaumur

To reverse the direction, multiply Celsius by 0.8:
°Re = °C × 0.8

Example: 60 °C = 48 °Re

Use the swap feature in this tool to instantly toggle between directions.