Réaumur to Rømer Conversion: A Comprehensive Guide

The Réaumur and Rømer scales are both historical temperature scales, offering intriguing glimpses into early scientific thought. While less common today, understanding their interconversion can be invaluable for historical research, scientific data analysis, and appreciating the evolution of thermometry.

Understanding the Réaumur Scale

Developed by René Antoine Ferchault de Raumur in 1730, the Réaumur scale is a descending scale where the freezing point of water is 0R and the boiling point of water is 80°R.

Understanding the Rømer Scale

Created by Danish astronomer Ole Rømer in 1701, the Rømer scale is also a descending scale. However, it's defined by the freezing point of brine (a salt-water solution) as 0°Rø and the boiling point of water as 60°Rø.

Réaumur to Rømer Conversion Formula

To convert a temperature from the Raumur scale to the Rømer scale, we use the following formula:

**Rømer (°Rø) = 7.5 - (Réaumur (°R) * 3/4)**

Example

Let's convert 20 degrees Réaumur to Rmer:

1. Apply the formula: Rmer = 7.5 - (20°R * 3/4)
2. Calculate: Rømer = 7.5 - 15
3. Result: 20 degrees Réaumur is equal to -7.5 degrees Rømer.

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