Rankine ⇄ Kelvin Converter

This Rankine to Kelvin converter is a quick, reliable tool designed for thermodynamics, physics, and engineering professionals who work with absolute temperature scales. Both Rankine and Kelvin start at absolute zero, making them ideal for scientific precision.

Rankine (°R) is primarily used in thermodynamic calculations in the United States, while Kelvin (K) is the globally recognized SI unit for absolute temperature. The conversion is simple and linear: K = °R × 5⁄9. Our tool handles this for you in real time.

To convert from Kelvin back to Rankine, use: °R = K × 9⁄5. This makes converting between the two systems seamless. Enter a value in either Rankine or Kelvin, and the equivalent temperature appears instantly in the other unit.

This converter is ideal for anyone working in scientific labs, HVAC, aerospace, or academic research. It simplifies calculations that would otherwise require formulas or reference tables. Additionally, it includes a table of frequently used conversions for quick reference.

For example, 0 °R = 0 K, and 491.67 °R = 273.15 K (the freezing point of water). These standardized values help with engineering reports, scientific documentation, and problem solving where precision is critical.

Designed using responsive Tailwind CSS, the interface is clean, mobile-friendly, and optimized for speed and clarity. Whether you’re working on your phone or desktop, the converter adapts to your screen size automatically.

This tool is part of our wider collection of unit converters, including tools for Celsius, Fahrenheit, Kelvin, and more. All converters are SEO-friendly, load instantly, and require no installation or sign-up. Simply bookmark and use as needed.