25
°C
77
°F
25
°C
77
°F
The Réaumur to Celsius Converter provides instant, accurate Réaumur to Celsius conversion. Temperature conversion is one of the most common unit conversions needed in science, cooking, weather, medicine, and international travel.
°C = °Ré × 5/4. The Réaumur scale sets water freezing at 0° and boiling at 80°
Unlike length or weight conversions which use simple multiplication, temperature conversions involve offset values because the scales have different zero points. Our converter handles these calculations precisely, supporting values from absolute zero to extreme temperatures.
Formula: Réaumur to Celsius conversion. °C = °Ré × 5/4. The Réaumur scale sets water freezing at 0° and boiling at 80°
Key reference temperatures: absolute zero (0 K = -273.15°C = -459.67°F), water freezing (273.15 K = 0°C = 32°F), body temperature (310.15 K = 37°C = 98.6°F), water boiling (373.15 K = 100°C = 212°F).
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Higher temperature conversion.
The formula is: Réaumur to Celsius conversion.
Absolute zero is 0 K = -273.15°C = -459.67°F = 0°R. It is the lowest possible temperature where molecular motion ceases.
-40 is the same in both scales: -40°C = -40°F.
Normal human body temperature is approximately 37°C = 98.6°F = 310.15 K.
Water boils at 100°C = 212°F = 373.15 K at standard atmospheric pressure (1 atm).
The temperature scales were developed by various scientists. Celsius by Anders Celsius (1742), Fahrenheit by Daniel Gabriel Fahrenheit (1724), Kelvin by Lord Kelvin (1848), Rankine by William Rankine (1859), Réaumur by René de Réaumur (1730).
Yes, temperature conversion formulas are mathematically exact definitions, not approximations.
Different scales were developed for different purposes: Celsius for everyday use (metric), Fahrenheit for everyday use (imperial), Kelvin for science (absolute), Rankine for engineering (absolute Fahrenheit).
Double the Celsius value and add 30 for a rough estimate. Example: 20°C → 40+30 = 70°F (exact: 68°F).
Room temperature is typically 20-25°C = 68-77°F = 293-298 K.
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