As we know One °Re is equal to 2.25 °R (1 °Re = 2.25 °R).

To convert Degree Reaumur to Degree Rankine, multiply your °Re figure by 2.25.

Example : convert 25 °Re to °R:

25 °Re = 25 × 2.25 °R = °R

To convert Degree Rankine to Degree Reaumur, divide your °R figure by 2.25.

Example : convert 25 °R to °Re:

25 °R = 25 ÷ 2.25 °Re = °Re