Rømer to Kelvin

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.

Kelvin (K): The Kelvin scale is the base unit of thermodynamic temperature in the International System of Units (SI). It is an absolute temperature scale, meaning 0 K (absolute zero) is the point where all thermal motion ceases. It has no degrees symbol (°).