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## How to convert Kelvin to Rankine (K to °R)

The formula for converting Kelvin to Rankine is: °R = K × 9⁄5. To calculate the Kelvin value in Rankine first substitute the Kelvin value into the preceding formula, and then perform the calculation. If we wanted to calculate 1 Kelvin in Rankine we follow these steps:

°R = K × 9⁄5

°R = 1 × 9⁄5

°R = 1.8

In other words, 1 Kelvin is equal to 1.8 Rankine.

## Example Conversion

Let's take a look at an example. The step-by-step process to convert 5 Kelvin to Rankine is:

- Understand the conversion formula: °R = K × 9⁄5
- Substitute the required value. In this case we substitute 5 for K so the formula becomes: °R = 5 × 9⁄5
- Calculate the result using the provided values. In our example the result is: 5 × 9⁄5 = 9 °R

In summary, 5 Kelvin is equal to 9 Rankine.

## Converting Rankine to Kelvin

In order to convert the other way around i.e. Rankine to Kelvin, you would use the following formula: K = °R × 5⁄9. To convert Rankine to Kelvin first substitute the Rankine value into the above formula, and then execute the calculation. If we wanted to calculate 1 Rankine in Kelvin we follow these steps:

K = °R × 5⁄9

K = 1 × 5⁄9

K = 0.5555555555555556

Or in other words, 1 Rankine is equal to 0.5555555555555556 Kelvin.

## Conversion Unit Definitions

### What is a Kelvin?

Absolute Temperature Scale: The Kelvin scale is an absolute temperature scale that measures temperature relative to absolute zero. It is named after the Scottish physicist William Thomson, 1st Baron Kelvin, who proposed the scale in the 19th century.

Zero Point: The Kelvin scale uses absolute zero as its zero point, which is the lowest possible temperature. At absolute zero, all molecular motion theoretically stops. Absolute zero on the Kelvin scale is equivalent to -273.15 degrees Celsius or -459.67 degrees Fahrenheit.

Metric System: The Kelvin scale is part of the metric system, which is a decimal-based system of measurement used internationally. It is the standard unit of temperature measurement in the International System of Units (SI).

Conversion: Kelvin can be converted to other temperature scales. To convert Kelvin to Celsius, you subtract 273.15 from the Kelvin measurement. To convert Kelvin to Fahrenheit, you first convert it to Celsius using the above formula and then use the conversion formula from Celsius to Fahrenheit.

Symbol: The symbol for Kelvin is "K". For example, a temperature measurement of 300 Kelvin would be written as 300 K.

Common Uses: The Kelvin scale is primarily used in scientific, technical, and international contexts. It is commonly employed in fields such as physics, chemistry, astronomy, and engineering. Kelvin is particularly useful in calculations involving temperature and energy, as it represents absolute temperature.

International Usage: The Kelvin scale is widely accepted and used internationally as a standard unit of temperature measurement, especially in scientific research, academic settings, and industrial applications. Its usage promotes consistency, compatibility, and ease of communication across different regions and scientific disciplines.

### What is a Rankine?

Absolute Temperature Scale: The Rankine scale is an absolute temperature scale that is similar to the Kelvin scale but uses a different zero point. On the Rankine scale, absolute zero is defined as 0 Rankine (°R), which is equal to -459.67 degrees Fahrenheit. The size of the Rankine degree is the same as the Fahrenheit degree, so the temperature increments are the same.

Conversion: Rankine can be converted to other temperature scales. One common conversion is to the Fahrenheit scale. The formula to convert Rankine to Fahrenheit is: Fahrenheit = Rankine - 459.67. Rankine can also be converted to the Kelvin scale by dividing the Rankine measurement by 1.8.

Symbol: The symbol for degrees Rankine is "°R". For example, a temperature measurement of 550 degrees Rankine would be written as 550 °R.

Common Uses: Rankine is primarily used in engineering and thermodynamics, especially in the United States. It is often used in the analysis and calculation of temperature in power generation, refrigeration, and other thermal systems.

Relationship to Other Scales: The Rankine scale is closely related to the Fahrenheit scale, as they have the same size of degree. However, Rankine is an absolute temperature scale, similar to the Kelvin scale. In fact, the Rankine scale and the Kelvin scale have the same temperature increments, with the only difference being the zero points.

International Usage: The Rankine scale is not widely used internationally, as the Kelvin scale is the standard for absolute temperature measurement in most countries around the world. The Rankine scale is mainly used in the United States, particularly in engineering and industrial applications.

## Kelvin To Rankine Conversion Table

Below is a lookup table showing common Kelvin to Rankine conversion values.

Kelvin (K) | Rankine (°R) |
---|---|

1 K | 1.8 °R |

2 K | 3.6 °R |

3 K | 5.4 °R |

4 K | 7.2 °R |

5 K | 9 °R |

6 K | 10.8 °R |

7 K | 12.6 °R |

8 K | 14.4 °R |

9 K | 16.2 °R |

10 K | 18 °R |

11 K | 19.8 °R |

12 K | 21.6 °R |

13 K | 23.4 °R |

## Other Common Kelvin Conversions

Below is a table of common conversions from Kelvin to other temperature units.

Conversion | Result |
---|---|

1 Kelvin in Celsius | -272.15 °C |

1 Kelvin in Fahrenheit | -457.87 °F |