Rankine to Kelvin Converter
Enter the temperature in rankine below to convert it to kelvin.
Convert Rankine to Kelvin
Enter a value in rankine (°R) to convert to kelvin (K).
Rankine to Kelvin Conversion Table
Table showing various rankine measurements converted to kelvin. Click any preset value or arrow to load it into the converter.
| Rankine (°R) | Kelvin (K) |
|---|---|
| -40 °R | -22.2222222 K |
| -20 °R | -11.1111111 K |
| -10 °R | -5.5555556 K |
| 0 °R | 0 K |
| 1 °R | 0.5555556 K |
| 2 °R | 1.1111111 K |
| 5 °R | 2.7777778 K |
| 10 °R | 5.5555556 K |
| 15 °R | 8.3333333 K |
| 20 °R | 11.1111111 K |
How to Convert Rankine to Kelvin
To convert rankine (°R) to kelvin (K), apply the thermodynamic scale offset formula rather than a single multiplication factor because the two temperature scales have different zero points.
You can use this standard formula to convert rankine to kelvin:
Each temperature reading in rankine is scaled and shifted by the zero-point offset to obtain the exact temperature in kelvin.
For example, here's how to convert 5 °R to kelvin using the formula above:
How Many Kelvin Are in a Rankine?
On the Rankine scale, a reading of 1 °R corresponds to 0.5555556 K on the Kelvin scale.
Our rankine to kelvin calculator automatically converts your temperature measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Rankine and kelvin are both units used to measure temperature. Keep reading to learn more about each unit.
What Is a Rankine?
Absolute thermodynamic temperature scale with Fahrenheit-sized degrees (0 °R = -459.67 °F). It serves as a primary reference unit for measuring temperature across scientific and practical applications. [1]
The rankine is classified as a US customary and imperial unit of temperature. Rankine can be abbreviated as °R; for example, 1 rankine can be written as 1 °R.
When working with rankine (°R) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, rankine (°R) are widely used across standard temperature applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
What Is a Kelvin?
Base SI thermodynamic temperature scale starting at absolute zero (0 K = -273.15 °C). It serves as a primary reference unit for measuring temperature across scientific and practical applications. [2]
The kelvin is classified as an International System of Units (SI) unit of temperature. Kelvin can be abbreviated as K; for example, 1 kelvin can be written as 1 K.
When working with kelvin (K) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, kelvin (K) are widely used across standard temperature applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting temperature between rankine (°R) and kelvin (K), keep full floating-point precision (1 °R = 0.5555556 K; 1 K = 1.8 °R) during intermediate calculations and round only the final kelvin figure to match your instrument tolerance.
More Rankine & Kelvin Conversions
Need to calculate in the opposite direction? Use our kelvin to rankine calculator to switch your starting unit immediately. You can also explore related tools such as converting kelvin to rankine, converting celsius to kelvin, or converting fahrenheit to kelvin.
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Temperature)·Temperature Metrology Standard — Rankine (°R) to Kelvin (K)
- [2]BIPM SpecificationBIPM (SI Base Unit: Kelvin (K))·Unit Specifications: Rankine (°R) & Kelvin (K)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9 (Heat & Temp))·Conversion Factors & Mathematical Basis (°R to K)