Convert Réaumur to Celsius
No popups. No autoplay ads. Accurate answers with formulas shown.
Science
About Temperature Conversions
Temperature breaks the pattern every other unit follows: the scales are non-linear and start from different zero points. You cannot multiply by one factor. Turning 0°C into Fahrenheit takes a multiply and an add (0°C × 9/5 + 32 = 32°F). Celsius and Fahrenheit cross at exactly -40°, which makes a quick sanity check easy. Scientific work leans on Kelvin, which starts at absolute zero (-273.15°C) and underpins thermodynamics, gas laws, and astrophysics. The formulas below cover seven scales, down to the historical Delisle, Newton, and Réaumur scales still cited in older literature.
Quick Conversions
| Unit Name | Symbol | Per 1 Réaumur |
|---|---|---|
| Celsius | °C | 1.25 |
| Delisle | °De | 148.125 |
| Fahrenheit | °F | 34.25 |
| Kelvin | K | 274.4 |
| Newton | °N | 0.4125 |
| Rankine | °R | 493.92 |
| Réaumur | °Ré | 1 |
Frequently Asked Questions
How do I convert Réaumur to Celsius?
To convert Réaumur to Celsius, use the conversion where 1 Réaumur (°Ré) = 1.25 Celsius (°C). For example, 1 Réaumur = 1.25 Celsius.
What are common Réaumur to Celsius conversions?
Here are common conversions: 1 Réaumur = 1.25 Celsius, 5 Réaumur = 6.25 Celsius, 10 Réaumur = 12.5 Celsius, 25 Réaumur = 31.25 Celsius, 50 Réaumur = 62.5 Celsius, 100 Réaumur = 125 Celsius.
When would I need to convert Réaumur to Celsius?
Temperature conversions are needed when traveling between countries using Celsius and Fahrenheit, adjusting oven temperatures in international recipes, interpreting weather forecasts abroad, and in scientific work requiring Kelvin or other absolute scales.
How precise are the conversions?
All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.