About Kelvin to Rankine Conversion
This tool converts Kelvin (K) to Rankine (°R) instantly and accurately. Just type a value and the equivalent appears in real time — useful for everyday checks, study, cooking, and technical work alike.
°R = K × 9/5Why Use This Converter
- Work with thermodynamics and heat-transfer calculations
- Bridge US customary engineering data with international SI standards
- Interpret values from textbooks and older technical literature
Common Use Cases
Engineering & Thermo
Textbooks & Specs
International Standards
How to Use the Converter
Enter the Kelvin value
Type your temperature in the input field. Decimals and negative values are fully supported.
Read the Rankine result
The equivalent in Rankine appears instantly as you type — no calculate button needed.
Copy or swap
Click copy to save the result to your clipboard, or use the swap button to reverse the direction and convert Rankine back to Kelvin.
Quick Reference Points
| Kelvin | Rankine |
|---|---|
| 0 K | 0°R |
| 100 K | 180°R |
| 273.15 K | 491.67°R |
| 300 K | 540°R |
| 373.15 K | 671.67°R |
| 1000 K | 1800°R |
Converter Features
Real-Time Conversion
Results update as you type, so you can compare several temperatures quickly without pressing any button.
Two-Way Conversion
The swap button instantly reverses the direction, turning the tool into a Rankine to Kelvin converter without leaving the page.
One-Click Copy
Copy the converted value to your clipboard with a single click and paste it into documents, messages, or other apps.
Accurate Calculation
Conversions use the exact mathematical formula and are rounded to 4 decimal places for practical, reliable accuracy.
Mobile-Friendly
Large touch targets and a responsive layout make the converter easy to use on phones and tablets, even while cooking or on the go.
Private & Offline
All calculations run locally in your browser. Nothing is sent to a server, and the tool keeps working once loaded, even without internet.
Frequently Asked Questions
What is the formula?
The formula is °R = K × 9/5. Simply multiply the Kelvin value by 1.8.
Why is the ratio 9/5 (1.8)?
Fahrenheit degrees are 9/5 the size of Celsius degrees. Rankine uses Fahrenheit-sized degrees and Kelvin uses Celsius-sized degrees, so the same ratio applies.
Is 0 K the same as 0°R?
Yes. Both equal absolute zero — the point where all molecular motion stops. They share the same zero point.
Is this conversion exact?
Yes. °R = K × 9/5 is mathematically exact, so the conversion introduces no approximation.
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