## Rankine to Rømer (ºR to °Rø) formula

**Rømer** = ((**Rankine** - 491.67) / 3.42857139) + 7.5

## About Rankine

Rankine is a unit of temperature measurement commonly used in engineering and thermodynamics. It is named after the Scottish engineer and physicist William John Macquorn Rankine, who made significant contributions to the field of thermodynamics in the 19th century. The Rankine scale is an absolute temperature scale, similar to the Kelvin scale, but with a different zero point.

The Rankine scale is based on the Fahrenheit scale, with the zero point set at absolute zero (-459.67°F). This means that the Rankine scale has the same size degree as the Fahrenheit scale, but starts at a different point. To convert between Rankine and Celsius, one must first convert from Celsius to Kelvin by adding 273.15, and then convert from Kelvin to Rankine by multiplying by 1.8. The formula for this conversion is: Rankine = (Celsius + 273.15) × 1.8.

While the Rankine scale is not commonly used in everyday life, it is widely used in engineering and thermodynamics, particularly in the United States. It is often used in calculations involving temperature differentials, such as in the study of heat transfer and energy systems. Understanding the Rankine scale and its conversion to Celsius is important for engineers and scientists working in these fields, as it allows for accurate and consistent temperature measurements and calculations.

## About Rømer

Rømer is an historical figures who made significant contributions to the field of temperature measurement.

Ole Rømer, a Danish astronomer, is known for his work in the late 17th century, where he made important observations and calculations related to the speed of light. However, Rømer also made contributions to temperature measurement by developing the Rømer scale. The Rømer scale, also known as the Danish scale, was based on the freezing and boiling points of water, similar to the Celsius scale. However, Rømer's scale used different reference points, with 0 degrees representing the freezing point of brine (a mixture of water and salt) and 60 degrees representing the boiling point of water. While the Rømer scale is no longer widely used, it played a role in the development of temperature measurement and served as an early precursor to the Celsius scale.