Temperatures: Farenheit and Centigrade - and Rankine!.Copyright © 1997-2010 All rights reserved
The Fahrenheit system has freezing point at 32°, and boiling point at
212°. Custom has it that zero degrees Farenheit was chosen as
the lowest temperature then attainable, and 100°F as body temperature. There are
180 degrees between 'freezing point' and 'boiling point'.
The Rankine scale has the same size of degree as the Fahrenheit, but with its zero at
absolute zero - so the 'boiling point' (212°F) is 671.67°R.
The temperture at which volumes etc. are defined in the Imperial system
To convert a Fahrenheit temperature to centigrade, do the following:
a) Subtract 32
b) Multiply by 5
c) Divide by 9
Try it with 66°F - you should get 19°C. To convert C to F,
just do it the other way round!