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Reaumur to Celsius, Fahrenheit & More Converter

This converter makes it easy to convert temperatures from the Reaumur scale to Celsius, Fahrenheit, Kelvin, and other popular units. It’s perfect for interpreting historical data, scientific archives, or vintage recipes that use the Reaumur system.

Reaumur Temperature Conversion Tool

Input Fields
°Re
°Re
Enter the temperature in degrees Reaumur
If enabled, the result will update automatically when you change any value.

Reaumur Temperature Conversion Formulas

Formula
$$\text{Celsius (°C)} = °Re \times 1.25$$ $$\text{Fahrenheit (°F)} = (°Re \times 1.25) \times 1.8 + 32$$ $$\text{Kelvin (K)} = (°Re \times 1.25) + 273.15$$ $$\text{Rankine (°R)} = (°Re \times 1.25) \times 1.8 + 491.67$$ $$\text{Newton (°N)} = \frac{°Re \times 1.25}{3.03030303}$$ $$\text{Delisle (°De)} = (100 – (°Re \times 1.25)) \times \frac{3}{2}$$ $$\text{Rømer (°Rø)} = \left( \frac{°Re \times 1.25}{1.9047619} \right) + 7.5$$

The Reaumur scale, once used in Europe, defines 0 °Re as the freezing point and 80 °Re as the boiling point of water. These formulas convert Reaumur values into other commonly used temperature scales.

The Reaumur scale is a historic temperature unit primarily used in 18th and 19th century Europe. While it’s rarely used today, some archival documents, scientific literature, and traditional recipes may still reference it. This converter helps convert Reaumur temperatures into modern units like Celsius, Fahrenheit, and Kelvin, as well as other legacy scales like Delisle, Newton, and Rømer.

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