Réaumur to Celsius
Convert °Ré to °C quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.
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CONVERTED RESULT—
Decimal places
CONVERSION RULE
Celsius equals Réaumur × 1.25.
How to use the Réaumur to Celsius
- Enter the number you want to convert.
- Confirm the source unit shown beside the input.
- Choose decimal precision if you need more or less detail.
- Read the converted result.
- Copy the result when you need to use it elsewhere.
How the conversion works
Celsius equals Réaumur × 1.25.
For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.
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Common °Ré to °C conversions
| °Ré | °C |
|---|---|
| 1 °Ré | 1.25 °C |
| 2 °Ré | 2.5 °C |
| 5 °Ré | 6.25 °C |
| 10 °Ré | 12.5 °C |
| 20 °Ré | 25 °C |
| 50 °Ré | 62.5 °C |
Example
For example, entering 1 °Ré gives approximately 1.25 °C using the rule above. Change the input to test your own value.
Frequently asked questions
The Réaumur to Celsius converts a value from °Ré to °C using the conversion relationship described on this page.
Enter your value, review the source and destination units, choose the decimal precision and read or copy the result.
Celsius equals Réaumur × 1.25.
Use enough precision for your purpose. Everyday estimates usually need fewer decimal places; technical work may require more.
It can be a useful reference calculation, but safety-critical, regulated, contractual or specialized work should be verified against the applicable authoritative standard.
Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.
Page reviewed: August 24, 2026.