Kelvins to degrees Rankine
Type a value in kelvins to see it in degrees Rankine straight away, or type in the second box to convert back.
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How to use it
- Type the value in the kelvins box.
- Read the result in degrees Rankine as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
°R = K × 1.8
Multiply the value in kelvins by 1.8 to get degrees Rankine.
Example
To convert 25 K to degrees Rankine: 25 × 1.8 = 45 °R.
Conversion table
| Kelvins (K) | Degrees Rankine (°R) |
|---|---|
| 1 | 1.8 |
| 2 | 3.6 |
| 3 | 5.4 |
| 5 | 9 |
| 10 | 18 |
| 20 | 36 |
| 25 | 45 |
| 50 | 90 |
| 100 | 180 |
| 250 | 450 |
| 500 | 900 |
| 1,000 | 1,800 |
About the units
- Kelvin
- The SI base unit of thermodynamic temperature, starting at absolute zero (0 K). Since 2019 it is defined by fixing the Boltzmann constant at 1.380649 × 10^-23 J/K.
- Degree Rankine
- An absolute scale that starts at absolute zero with Fahrenheit-sized degrees, so °R = K × 9/5 exactly. It appears in some US thermal engineering work.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many degrees Rankine are in one kelvin?
1 K = 1.8 °R exactly.
How do I convert kelvins to degrees Rankine?
Use °R = K × 1.8. For example, 25 K = 45 °R.
How many kelvins are in one degree Rankine?
1 °R = 0.555556 K.
Why is temperature conversion not a simple multiplication?
Celsius and Fahrenheit do not start at absolute zero, so converting needs an offset as well as a factor. For example °F = °C × 9/5 + 32, which is why 0 °C is 32 °F, not 0.
At what temperature are Celsius and Fahrenheit equal?
At minus 40: -40 °C is exactly -40 °F.