Rømer to Fahrenheit

Rømer (°Rø): The Rømer scale was an early scale invented by Ole Christensen Rømer. It defined the freezing point of water as 7.5 degrees and the boiling point as 60 degrees. It was a direct influence on the Fahrenheit scale.

Fahrenheit (°F): The Fahrenheit scale is primarily used in the United States and a few other countries. It defines the freezing point of water at 32 °F and the boiling point at 212 °F, separating the two points by 180 degrees.