Kelvin to Rankine
( K → °R )
Instantly convert Kelvin to Rankine. Enter any value below and get an accurate result with the full formula and reference table.
How to Convert Kelvin to Rankine
To convert Kelvin to Rankine, multiply the Kelvin temperature by 9/5 (or 1.8). This is because both scales are absolute and have the same zero point, but Rankine uses the Fahrenheit degree size.
Step-by-Step Example
Let’s convert 300 K to Rankine:
1. Multiply by 9/5: 300 × 9/5 = 540
2. So 300 K equals 540°R.
Another common example: 373.15 K (boiling point of water) → 373.15 × 9/5 = 671.67°R.
Note on Absolute Zero
Both Kelvin and Rankine start at absolute zero: 0 K = 0°R. They are both absolute temperature scales, with Kelvin used in science worldwide and Rankine used in some engineering fields, particularly in the United States.
When You’d Use Each Unit
Kelvin is the SI unit for temperature and is used in physics, chemistry, and engineering. Rankine is used in some engineering applications, especially in fields like thermodynamics where Fahrenheit-based calculations are common. Converting between them is straightforward.
Common Kelvin values converted to Rankine — typical values highlighted.
| Kelvin (K) | Rankine (°R) | Approximate |
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