# Celsius to Rømer

Calculates the Rømer temperature from the given Celsius or centigrade scale value

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## Celsius to Rømer

The Celsius or centigrade temperature scale is based on the water tristate, placing the 0 at the point when the liquid water becomes ice, and the 100 at the point when the liquid water becomes gas, both at 1 atm pressure. Its unit is represented with ℃ after the value.

The Rømer temperature scale was proposed by Ole Christensen Rømer in 1701. This measure was fix the zero initially using freezing brine, then it adjusts 60 degree at the point of the boiling of pure water and 7.5 degree as the freezing point. The unit is represented by °Rø after the value. Beware sometimes it has appeared as °R just like for Réaumur and Rankine scales.

The Rømer temperature scale values are calculated from Celsius using the formula $$Celsius × {21 \over 40} + 7.5$$