Kelvin to Rankine Converter
Convert kelvins (K) to degrees Rankine (°R) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Kelvin to Rankine formula
°R = K × 9/5
To convert kelvins to degrees Rankine, apply the formula °R = K × 9/5. For example, 300 K:
°R = 300 × 9/5°R = 540
So 300 K = 540 °R.
Mental math shortcut
This conversion is exact, so there is no need to estimate: it uses a fixed offset or the exact 9/5 factor.
Kelvin to Rankine conversion table
Rankine back to Kelvin
The same values converted the other way, rounded for everyday use:
| Rankine | Kelvin |
|---|---|
| 0 °R | 0 K |
| 180 °R | 100 K |
| 360 °R | 200 K |
| 491.67 °R | 273.15 K |
| 527.67 °R | 293.15 K |
| 540 °R | 300 K |
| 671.67 °R | 373.15 K |
| 900 °R | 500 K |
About the units
Kelvin (K)
The kelvin is the SI unit of temperature. It starts at absolute zero (0 K = −273.15 °C) and uses degrees the same size as Celsius, so it never goes negative.
Rankine (°R)
The Rankine scale starts at absolute zero like Kelvin but uses Fahrenheit-sized degrees (0 °R = −459.67 °F). It is still used in some US engineering work.
Frequently asked questions
How do you convert Kelvin to Rankine?
Use °R = K × 9/5. For example, 300 K = 540 °R.
What is 300 Kelvin in Rankine?
300 K = 540 °R.
How do I convert Rankine back to Kelvin?
Use the reverse formula: K = °R × 5/9.