Kelvin to Rankine Converter
Unit ConversionConvert Kelvin to Rankine using the exact formula R = K x 9/5.
Rankine
Equivalent temperature in Rankine
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Unit Conversion calculators
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SponsoredThis calculator converts a temperature in Kelvin to degrees Rankine using the exact formula: multiply the Kelvin value by 9/5, the same as multiplying by 1.8. Kelvin and Rankine are both absolute temperature scales, meaning each one has a true zero point at absolute zero rather than an arbitrary reference like the freezing point of water, so converting between them only involves resizing the degree, with no offset to add or subtract.
A Kelvin is the same size as a degree Celsius, while a Rankine degree is the same size as a degree Fahrenheit, and a Celsius degree is larger than a Fahrenheit degree by a factor of 9/5. That is exactly where the 9/5 multiplier in this formula comes from. Because both scales share the same true zero, this calculator floors its result at 0°R for any Kelvin input below 0 K, since an unclamped result would describe a temperature colder than absolute zero.
For the reverse direction, converting a Rankine value into Kelvin, or converting to Celsius or Fahrenheit instead, see the related converters below.
Kelvin to Rankine conversion table
This table spans from absolute zero up through common scientific and everyday reference points.
| Kelvin | Rankine |
|---|---|
| 0 K | 0°R |
| 100 K | 180°R |
| 273.15 K | 491.67°R |
| 293.15 K | 527.67°R |
| 310.15 K | 558.27°R |
| 373.15 K | 671.67°R |
The Kelvin to Rankine formula
To convert Kelvin to Rankine, multiply the Kelvin value by 9/5 (or 1.8). For example, 300 K multiplied by 1.8 equals 540°R.
To go the other way, from Rankine back to Kelvin, divide by 1.8 (or multiply by 5/9) instead. For example, 540°R divided by 1.8 equals 300 K. For the Fahrenheit or Celsius scale instead, use the Kelvin to Fahrenheit or Celsius to Rankine converters.
Frequently Asked Questions
What is the formula to convert Kelvin to Rankine?
Multiply the Kelvin value by 9/5 (or 1.8). For example, 273.15 K multiplied by 1.8 equals 491.67°R.
What is 0 Kelvin in Rankine?
0 K equals 0°R. Both scales share the same absolute zero.
Can a Kelvin value be negative?
No. Kelvin is an absolute scale with a true zero point at absolute zero, so negative Kelvin values are not physically meaningful. This calculator floors its result at 0°R for any Kelvin input below 0 K.
Why is converting Kelvin to Rankine just a multiplication?
Both Kelvin and Rankine are absolute scales that put zero at absolute zero, so there is no offset to correct for, only a resizing factor, since a Kelvin is larger than a Rankine degree by a factor of 9/5.
What is room temperature in Rankine, starting from Kelvin?
Room temperature, about 293.15 K, converts to approximately 527.67°R.
Is a Kelvin the same size as a Rankine degree?
No. A Kelvin is the same size as a degree Celsius, while a Rankine degree is the same size as a degree Fahrenheit. Since a Celsius degree is larger, one Kelvin equals exactly 1.8 degrees Rankine.
Where is the Rankine scale used instead of Kelvin?
Rankine mainly appears in specific US engineering and thermodynamics fields, such as some aerospace and mechanical engineering calculations, where the underlying formulas already use Fahrenheit sized degrees but still need an absolute scale with no negative values.
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