As we know One °R is equal to 0.5555555556 °C (1 °R = 0.5555555556 °C).

To convert Degree Rankine to Degree Celsius, multiply your °R figure by 0.5555555556.

Example : convert 25 °R to °C:

25 °R = 25 × 0.5555555556 °C = °C

To convert Degree Celsius to Degree Rankine, divide your °C figure by 0.5555555556.

Example : convert 25 °C to °R:

25 °C = 25 ÷ 0.5555555556 °R = °R