Rankine to Celsius

Rankine (°R): The Rankine scale is an absolute thermodynamic temperature scale that uses the Fahrenheit degree size. Zero degrees Rankine (°R) is equivalent to absolute zero. It is primarily used in engineering systems in the United States.

Celsius (°C): The Celsius scale, also known as the centigrade scale, is the most widely used temperature scale in the world. It is an interval system defined by 0 °C as the freezing point of water and 100 °C as the boiling point of water at standard atmospheric pressure.