Convert Kelvin to Rankine
1 kelvin (K) equals 1.8 degrees Rankine (°R).
1 K = 1.8 °R
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Kelvin to Rankine converter to paste a column from Excel.
How to Convert Kelvin to Rankine
- 1 K = 1.8 °R
- 1 °R = 0.5555555556 K
- Example: convert 15 K to °R: 15 K = 15 × 1.8 °R = 27 °R
Formula
°R = K × 1.8
Derivation from SI units:
- SI base unit, fixed by the Boltzmann constant k = 1.380649 × 10⁻²³ J/K
- T(K) = T(°R) × 5/9; T(°R) = t(°F) + 459.67
Both units are defined exactly, so the factor is exact. Kelvin definition: kelvin; Rankine definition: degree Rankine.
Worked examples
- A reading of 273.15 K converts to 491.67 °R.
273.15 K × 1.8 = 491.67 °R - A value of 500 K is 900 °R.
500 K × 1.8 = 900 °R
Kelvin to Rankine conversion table
| Kelvin (K) | Rankine (°R) |
|---|---|
| 0 K | 0 °R |
| 4.2 K | 7.56 °R |
| 77 K | 138.6 °R |
| 173.15 K | 311.67 °R |
| 233.15 K | 419.67 °R |
| 255.37 K | 459.666 °R |
| 273.15 K | 491.67 °R |
| 288.15 K | 518.67 °R |
| 293.15 K | 527.67 °R |
| 298.15 K | 536.67 °R |
| 310.15 K | 558.27 °R |
| 373.15 K | 671.67 °R |
| 500 K | 900 °R |
| 773.15 K | 1391.67 °R |
| 1000 K | 1800 °R |
| 1273.15 K | 2291.67 °R |
| 1500 K | 2700 °R |
| 2000 K | 3600 °R |
| 5778 K | 10400.4 °R |
Where it's used
Kelvin are used for physics, chemistry and gas-law calculations (PV = nRT), while degrees Rankine appear in US thermodynamics and gas-law calculations in inch-pound units. Both measure thermodynamic temperature, so the conversion is a fixed factor.
Kelvin to other temperature units
| Conversion | 1 K equals |
|---|---|
| Kelvin to Celsius | -272.15 °C |
| Kelvin to Fahrenheit | -457.87 °F |
| Kelvin to Rankine | 1.8 °R |
Frequently asked questions
How many degrees Rankine are in 1 kelvin?
1 K = 1.8 °R.
How do I convert kelvins to degrees Rankine?
Multiply the value in K by 1.8. For example, 15 K × 1.8 = 27 °R.
Is the K to °R conversion exact?
Yes. Both units are defined exactly, and 1 K is exactly 1.8 °R.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Section 2.3.1, base unit definitions.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "degree Rankine (°R)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Kelvin to Rankine. Retrieved October 17, 2026, from https://scientificconverters.com/temperature/kelvin-to-rankine/
IEEE
Scientific Converters, "Convert Kelvin to Rankine," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/temperature/kelvin-to-rankine/