How many degrees Celsius are in 1 degree Rankine?

1 degree Rankine equals -272.594 °C.

How do I convert degrees Celsius back to degrees Rankine?

Use the reverse converter: 1 degree Celsius equals 493.47 °R.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert degrees Rankine to degrees Celsius, use the formula °C = °R × 5/9 − 273.15.

°C = °R × 5/9 − 273.15

90 °R → °C = °R × 5/9 − 273.15 → -223.15 °C

Kelvin and Rankine start at absolute zero, so negative values are physically impossible.

Degree Rankine (°R): An absolute scale using Fahrenheit-sized degrees, zero at absolute zero. Used in some US thermodynamics and engineering work.
Degree Celsius (°C): The temperature scale used by most countries and in science. Defined by Anders Celsius in 1742; 0 °C is water's freezing point and 100 °C its boiling point at sea level.

How do I convert degrees Rankine to degrees Celsius?: To convert degrees Rankine to degrees Celsius, use the formula °C = °R × 5/9 − 273.15.
How many degrees Celsius are in 1 degree Rankine?: 1 degree Rankine equals -272.594 °C.
How many degrees Celsius are in 10 degrees Rankine?: 10 °R equals -267.594 °C.
How do I convert degrees Celsius back to degrees Rankine?: Use the reverse converter: 1 degree Celsius equals 493.47 °R.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.