Degree Rankine to Degree Reaumur Conversion

Convert between Degree Rankine and Degree Reaumur quickly and accurately.

From Degree Rankine

°R

To Degree Reaumur

°r

How to Convert Degree Rankine to Degree Reaumur

Conversion Formula

1 °R = 0.444 °r

1 °r = 2.25 °R

Example

Convert 15 °R to °r:

15 °R = 15 × 0.444 °r = 6.667 °r

Unit Information

Learn about the temperature interval units you're converting between

Degree Rankine

°R

Definition

The degree Rankine (°R) is an absolute temperature scale unit that is also used for temperature intervals. It is equal to 5/9 of a kelvin and represents the same temperature interval as degree Fahrenheit, but on an absolute temperature scale rather than a relative one.

History/Origin

Named after William John Macquorn Rankine, the degree Rankine was developed as an absolute temperature scale based on the Fahrenheit scale. For temperature intervals, it provides the same resolution as degree Fahrenheit but is used in absolute temperature measurements.

Current Use

Used in engineering applications, particularly in thermodynamics and heat transfer calculations where absolute temperature measurements are required. It is commonly used in power generation, refrigeration, and aerospace engineering for temperature interval measurements.

Multiplier

0.556

Offset

Degree Reaumur

°r

Definition

The degree Reaumur (°r) is a temperature interval unit equal to 5/4 of a kelvin. It was historically used in some European countries and provides a different scale for temperature differences, with one degree Reaumur representing a larger temperature change than one degree Celsius.

History/Origin

Named after René Antoine Ferchault de Réaumur, the degree Reaumur was developed in the 18th century as an alternative temperature scale. It was defined as 1/80 of the temperature difference between the freezing and boiling points of water, making it larger than the Celsius scale.

Current Use

Rarely used in modern applications but occasionally found in historical literature and some specialized scientific contexts. It is mainly of historical interest and is sometimes used in temperature interval calculations for historical data analysis.

Multiplier

1.25

Offset