## Rankine (ºR) to Celsius (℃) conversion formula

**Celsius** = (**Rankine** - 491.67) / 1.79999999

## Rankine to Celsius conversion

Rankine and Celsius are two different units of temperature measurement. Rankine is a unit of temperature in the absolute temperature scale, while Celsius is a unit of temperature in the Celsius scale. The Rankine scale is commonly used in engineering and physics, particularly in the United States, while the Celsius scale is widely used in most parts of the world.

To convert Rankine to Celsius, you can use the following formula: Celsius = (Rankine - 491.67) × 5/9. In this formula, 491.67 is the conversion factor to adjust for the difference between the zero points of the two scales. By subtracting 491.67 from the given temperature in Rankine and then multiplying the result by 5/9, you can obtain the equivalent temperature in Celsius.

For example, let's say you have a temperature of 600 Rankine. To convert it to Celsius, you would subtract 491.67 from 600, which gives you 108.33. Then, by multiplying 108.33 by 5/9, you find that the temperature in Celsius is approximately 60.18 degrees.

## Definition of Rankine and Celsius

Rankine is a unit of temperature in the absolute temperature scale, commonly used in engineering and physics. It is named after the Scottish engineer and physicist William John Macquorn Rankine. The Rankine scale is based on the Fahrenheit scale, with zero Rankine being absolute zero (-459.67°F) and each degree Rankine being equal to one degree Fahrenheit. This means that the Rankine scale has the same size degree as the Fahrenheit scale, but it starts at absolute zero instead of the freezing point of water.

The Celsius scale, also known as the centigrade scale, is a widely used temperature scale in which the freezing point of water is defined as 0 degrees Celsius and the boiling point of water is defined as 100 degrees Celsius. The Celsius of Rankine conversion formula is derived from the relationship between the Rankine and Celsius scales, allowing for the conversion of temperatures between the two scales. It is important to note that the Celsius of Rankine conversion is a linear conversion, meaning that the size of the degree remains the same in both scales.

## Why is Rankine used?

Rankine is primarily used in the United States and a few other countries that still rely on the Fahrenheit scale for temperature measurement. The Rankine scale is an absolute temperature scale, similar to the Kelvin scale, but it is based on the Fahrenheit degree rather than the Celsius degree.

The use of Rankine is mainly due to historical reasons and the prevalence of the Fahrenheit scale in certain industries and regions. The Fahrenheit scale was developed by Daniel Gabriel Fahrenheit in the early 18th century and gained popularity in the United States. As a result, many engineering and scientific disciplines in the US continue to use the Fahrenheit scale, including the field of thermodynamics.

Rankine is particularly useful in thermodynamics because it allows for direct conversion between temperature and energy. This is because the Rankine scale has the same degree size as the Fahrenheit scale, making it easier to work with in certain calculations and equations. Additionally, the use of Rankine allows for consistency and compatibility with existing data and formulas that were developed using the Fahrenheit scale.

While the use of Rankine is limited to specific industries and regions, it remains an important unit of measurement in thermodynamics for those who rely on the Fahrenheit scale. However, with the increasing global adoption of the Celsius and Kelvin scales, the use of Rankine is gradually becoming less common outside of the United States.