Farenheit, Celsius, and Kelvin Scales

The farenheit scale comes from Germany.  Numbers were put on the scale according to what local temperatures were.  This meant that in colder places, there could be negative temperatures below the "zero" on Farenheit's scale.

The Celsius scale comes from Sweden. Its main difference from the Farenheit scale is that it uses water's boiling and freezing points as references.  Water freezes/melts at zero and boils/condences at 100.

To switch between these two, use these equations:

°F=(9*°C)/5+32
                        _
°C=(5*°F)/9-17.7

A better scale would not have any negative numbers in it.  We do math in physics all the time, and if a zero or a negative number pops up, then the math goes bad.  Just try dividing by zero in a problem with temperature in the denominator!

Enter the Kelvin scale.  This British guy decided that the absolute coldest possible temperature anywhere in the universe should be used as zero.  The size of a degree Kelvin is the same as a Celsius degree, so swapping these two is easy...

K=°C+273.15

HERE is a site with info and links about these scales, and HERE is a site that will convert them for you.