How many kelvins are in 1 degree Rankine?

1 degree Rankine equals 0.555556 K.

How do I convert kelvins back to degrees Rankine?

Use the reverse converter: 1 kelvin equals 1.8 °R.

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

To convert degrees Rankine to kelvins, use the formula K = °R × 5/9.

K = °R × 5/9

90 °R → K = °R × 5/9 → 50 K

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.
Kelvin (K): The SI base unit of temperature, with zero at absolute zero. Named after Lord Kelvin and used in physics and chemistry.

How do I convert degrees Rankine to kelvins?: To convert degrees Rankine to kelvins, use the formula K = °R × 5/9.
How many kelvins are in 1 degree Rankine?: 1 degree Rankine equals 0.555556 K.
How many kelvins are in 10 degrees Rankine?: 10 °R equals 5.55556 K.
How do I convert kelvins back to degrees Rankine?: Use the reverse converter: 1 kelvin equals 1.8 °R.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.