Reaumur to Fahrenheit Converter

Summary

Enter a Reaumur temperature to get the Fahrenheit equivalent instantly, with formula display and common reference points.

How it works

1. Enter a temperature in the Reaumur field to get the Fahrenheit value.
2. Or type in the Fahrenheit field to convert back to Reaumur.
3. The formula updates in real time to show the exact calculation.
4. Click any row in the reference table to load that value into the converter.
5. Click "Clear" to reset both fields.

Use cases

• Convert historical European temperature records written in Reaumur.
• Read antique thermometers that use the Reaumur scale.
• Cross-check scientific literature from the 18th and 19th centuries.
• Compare Reaumur readings to modern Fahrenheit equivalents.
• Verify conversions done by hand using the °Ré × 2.25 + 32 formula.

Frequently Asked Questions