Rankine to Kelvin Converter
Quick answer: Rankine to Kelvin: use K = °R × 5/9. For example, 37 °R is 20.55556 K.
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Use the Rankine to Kelvin Converter
Rankine to Kelvin formula and what each symbol means
K = °R × 5/9
| Symbol | Meaning |
|---|---|
| °R | Degree Rankine |
| K | Kelvin |
Rankine to Kelvin examples
0 °R
0 °R = 0 K.
37 °R
37 °R = 20.55556 K.
100 °R
100 °R = 55.55556 K.
Rankine compared with Kelvin
These two scales agree at exactly 0: 0 °R = 0 K. Use that fixed point as a quick sanity check on any result.
About Rankine and Kelvin
Degree Rankine (°R): Rankine: an absolute scale with Fahrenheit-sized degrees, where 0 °R is absolute zero. Kelvin (K): The SI base unit of thermodynamic temperature, where 0 K is absolute zero.
Where Rankine to Kelvin conversions are used
Weather forecasts, ovens and body temperature use different scales depending on the country. Science and engineering work in kelvin, because it starts at absolute zero.
How to calculate Rankine to Kelvin step by step
- Enter the value in °R.
- Apply the formula K = °R × 5/9.
- The result is in K. Use the reverse formula to go back.
Popular temperature conversions
How to read your Rankine to Kelvin result
Water freezes at 0 °C, 32 °F and 273.15 K, and boils at 100 °C, 212 °F and 373.15 K at standard pressure.
| RANKINE | KELVIN |
|---|---|
| -40 | -22.22222 |
| -10 | -5.555556 |
| 0 | 0 |
| 20 | 11.11111 |
| 37 | 20.55556 |
| 50 | 27.77778 |
| 100 | 55.55556 |
| 212 | 117.7778 |
Kelvin to Rankine: quick table
| KELVIN | RANKINE |
|---|---|
| -40 | -72 |
| -10 | -18 |
| 0 | 0 |
| 15 | 27 |
| 25 | 45 |
| 37 | 66.6 |
| 60 | 108 |
| 90 | 162 |
Common mistakes when calculating Rankine to Kelvin
- Multiplying by 1.8 but forgetting to add 32 when converting Celsius to Fahrenheit.
- Using a single multiplier: this conversion is not a simple scale, so follow the full formula K = °R × 5/9.
Rankine to Kelvin FAQ
What is the formula to convert Rankine to Kelvin?
K = °R × 5/9.
What is the formula to convert Kelvin to Rankine?
°R = K × 9/5.
What is 0 °R in K?
0 °R equals 0 K.
What is a kelvin (K)?
The SI base unit of thermodynamic temperature, where 0 K is absolute zero.
How can I estimate Rankine to Kelvin in my head?
These two scales agree at exactly 0: 0 °R = 0 K. Use that fixed point as a quick sanity check on any result.
What is 60 °R in Kelvin?
60 °R = 33.33333 K, using K = °R × 5/9.
What is 30 °R in Kelvin?
30 °R = 16.66667 K, using K = °R × 5/9.
What is 15 °R in Kelvin?
15 °R = 8.333333 K, using K = °R × 5/9.
How many decimals should I keep when converting °R to K?
Match the precision of your original measurement. For example, 20.55556 K rounds to 20.6 K at 3 significant figures; keep more digits only for engineering or scientific work.
More in Temperature converters
- Celsius to Rankine Converter
- Kelvin to Fahrenheit Converter
- Fahrenheit to Celsius Converter
- Kelvin to Celsius Converter
- Fahrenheit to Kelvin Converter
- Fahrenheit to Rankine Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the kelvin