Fahrenheit has finer granularity without fractions.

IOW each Celsius degree is bigger than each Fahrenheit degree.

Even though the F numbers are so much higher and it seems unbearably hot :)

So for a thermostat that only can be set in 1 degree increments (without a decimal point), you have finer control when using F than using C.

Anybody can memorize the conversion more easily by throwing out the math, using table lookup -- made easier by throwing out most of the table too.

Just remember every 5 C equals a non-fractional F.

And every 5 C equals 9 F.

If all you are interested in is comfort level it's like this:

   C   F
  
   0  32
   5  41
  10  50
  15  59
  20  68
  25  77
  30  86
  35  95
  40 104
  

Looks like it increases by 1 each time in the tens column, but it's only 9 so 50 & 59 are the outliers, which most people have memorized already.

If you are a Celsius native and you think in terms of 10, 15, 20, 25, 30 -- you only need to remember 5 different F numbers, 50, 59, 68, 77 & 86 and that will get you far.

Good luck using these as your lottery numbers ;)

Ahhh, I mean that's all very well .. but I'm over 60 and I've literally never used or needed to use Fahrenheit - and I had a long career in geophysical and physical data aquisition, ran several kinds of furnaces and annealing ovens 24/7 for a decade, do a lot of cooking, etc.

So, I appreciate your rendition of things I have tables for already but any actual need is sadly non existant.