›› Measurement unit: Romer

Full name: degree Rømer

Plural form: degrees Rømer

Symbol: °Rø

Alternate spelling: Rømer

Category type: temperature

Scale factor: 1.9047619047619


›› SI unit: kelvin

The SI base unit for temperature is the kelvin.
1 kelvin is equal to 0.525 Romer.


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›› Definition: Romer

Rømer is a disused temperature scale named after the Danish astronomer Ole Christensen Rømer, who proposed it in 1701.

In this scale, the zero was initially set using freezing brine. The boiling point of water was defined as 60 degrees. Rømer then saw that the freezing point of water fell at roughly one eighth of that value (7.5 degrees), so he used that value as the other fixed point. Thus the unit of this scale, a Rømer degree, is 40/21sts of a kelvin (or of a Celsius degree). The symbol is sometimes given as °R, but since that is also sometimes used for the Rankine scale, the other symbol °Rø is to be preferred. The name should not be confused with Réaumur.

Daniel Gabriel Fahrenheit learned of Rømer's work and visited him in 1708; he improved on the scale, increasing the number of divisions by a factor of four and eventually establishing what is now known as the Fahrenheit scale, in 1724.


›› Sample conversions: Romer

Romer to degree Delisle
Romer to degree Rømer
Romer to degree Réaumur
Romer to degree newton
Romer to kelvin
Romer to degree Fahrenheit
Romer to degree Celsius
Romer to degree Rankine