Rømer to Celsius

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.

Celsius (°C): The Celsius scale, also known as the centigrade scale, is the most widely used temperature scale in the world. It is an interval system defined by 0 °C as the freezing point of water and 100 °C as the boiling point of water at standard atmospheric pressure.