As we know One °C is equal to 1.8 °R (1 °C = 1.8 °R).

To convert Degree Centigrade to Degree Rankine, multiply your °C figure by 1.8.

Example : convert 25 °C to °R:

25 °C = 25 × 1.8 °R = °R

To convert Degree Rankine to Degree Centigrade, divide your °R figure by 1.8.

Example : convert 25 °R to °C:

25 °R = 25 ÷ 1.8 °C = °C