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Rankine Converters

Convert temperatures between Rankine and Fahrenheit, Celsius, and Kelvin scales.

What this tool does

Convert temperatures between Rankine and Fahrenheit, Celsius, and Kelvin scales. Type an amount in degrees Rankine, choose the units, and the tool converts it to degrees Fahrenheit. It offers 4 temperature units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Degree Rankine, Degree Fahrenheit, Degree Celsius, Kelvin. Starts as Degree Rankine.
  • To: Choose one of the same 4 units as "From". Starts as Degree Fahrenheit.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from degrees Rankine to degrees Fahrenheit:

  • 1 °R = -458.67 °F
  • 5 °R = -454.67 °F
  • 10 °R = -449.67 °F
  • 50 °R = -409.67 °F
  • 100 °R = -359.67 °F

Subtract 459.67 from the number of degrees Rankine to get degrees Fahrenheit. This formula follows from exact definitions.

Sources: Degree Rankine: NIST SP 811 (2008), Appendix B.8. Degree Fahrenheit: NIST SP 811 (2008), Appendix B.8.

Limitations

  • Converts a temperature reading only. A temperature difference, such as a rise of 10 degrees, converts differently because it has no offset.
  • Nothing below absolute zero is accepted.

FAQs

Q: How do I convert Rankine to Fahrenheit?
A: Subtract 459.67 from the Rankine value. 0 °R is -459.67 °F, which is absolute zero.
Q: How do I convert Rankine to Kelvin?
A: Divide the Rankine value by 1.8 (multiply by 5/9).
Q: What is the Rankine scale used for?
A: It is an absolute scale with Fahrenheit-sized degrees, used in some engineering and thermodynamics work in the United States.

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