# How to convert a temperature to Réaumur

Formulas to convert a unit of temperature to degrees Réaumur.

## Formula to convert Fahrenheit to Réaumur

Formula for converting from degrees Fahrenheit (°F) to degrees Réaumur (°Ré) is:

T(°Ré) = [T(°F) - 32] × 4/9

How many degrees Réaumur (°Ré) correspond to 100 degrees Fahrenheit (°F)?

Replace T(°F) in the °F to °Ré formula for 100, subtract 32, multiply by 4 and divide by 9.

T(°Ré) = [100 - 32] × 4/9

T(°Ré) = 30.22 or

100 °F = 30.22 °Ré

100 degrees Fahrenheit equal 30.22 degrees Réaumur.

## Formula to convert Celsius to Réaumur

Formula for converting from degrees Celsius (°C) to degrees Réaumur (°Ré) is:

T(°Ré) = T(°C) × 4/5

How many degrees Réaumur (°Ré) correspond to 90 degrees Celsius (°C)?

Replace T(°C) in the °C to °Ré formula for 90, multiply by 4 and divide by 5.

T(°Ré) = 90 × 4/5

T(°Ré) = 72 or

90 °C = 72 °Ré

90 degrees Celsius equal 72 degrees Réaumur.

## Formula to convert Kelvin to Réaumur

Formula for converting from kelvin (K) to degrees Réaumur (°Ré) is:

T(°Ré) = [T(K) - 273.15] × 4/5

How many degrees Réaumur (°Ré) correspond to 300 kelvins (K)?

Replace T(K) in the K to °Ré formula for 300, subtract 273.15, multiply by 4 and divide by 5.

T(°Ré) = [300 - 273.15] × 4/5

T(°Ré) = 21.48 or

300 K = 21.48 °Ré

300 kelvins equal 21.48 degrees Réaumur.

## Formula to convert Rankine to Réaumur

Formula for converting from degrees Rankine (°R) to degrees Réaumur (°Ré) is:

T(°Ré) = [T(°R) - 491.67] × 4/9

How many degrees Réaumur (°Ré) correspond to 500 degrees Rankine (°R)?

Replace T(°R) in the °R to °Ré formula for 500, subtract 491.67, multiply by 4 and divide by 9.

T(°Ré) = [500 - 491.67] × 4/9

T(°Ré) = 3.7 or

500 °R = 3.7 °Ré

500 degrees Rankine equal 3.7 degrees Réaumur.