Quick Answer:
K = °R × 5/9. To convert Rankine to Kelvin, multiply the Rankine value by 5/9.
Rankine and Kelvin are absolute temperature scales used in engineering thermodynamics in the US and internationally.
Detailed Overview: Rankine to Kelvin
The Rankine scale is an absolute temperature scale based on Fahrenheit degrees, starting at absolute zero. The Kelvin scale is based on Celsius degrees. K = °R × 5/9. Reverse: °R = K × 9/5. Used in US engineering thermodynamics, power plants, and aerospace. 491.67°R equals 273.15 K.
Conversion Reference Table
0°R = 0 K, 491.67°R = 273.15 K, 527.67°R = 293.15 K, 671.67°R = 373.15 K, 900°R = 500 K, 1800°R = 1000 K
Practical Calculation Example
Convert 720°R: K = 720 × 5/9 = 400 K. Reverse: 300 K = 300 × 9/5 = 540°R
Key Takeaways
K = °R × 5/9. Multiply Rankine by 5/9 for Kelvin. Multiply Kelvin by 9/5 for Rankine.
THE AUTORANK Editorial Note: US thermodynamic tables often use Rankine, while international standards use Kelvin, so convert before comparing data.
Frequently Asked Questions
Q: How do I convert Rankine to Kelvin quickly?
A: Multiply the Rankine value by 0.556 for a fast estimate. Example: 900°R × 0.556 = 500 K, exact.
A: Multiply the Rankine value by 0.556 for a fast estimate. Example: 900°R × 0.556 = 500 K, exact.
Q: Is 0°R the same as 0 K?
A: Yes, 0°R equals 0 K, both representing absolute zero.
A: Yes, 0°R equals 0 K, both representing absolute zero.
The Rankine to Kelvin factor of 5/9 is essential for US engineering thermodynamics.
Related Converters: Kelvin to Fahrenheit | Celsius to Kelvin