HP Calculators with native C-F temperature conversion

[DGM]

(02-10-2024 11:25 AM)calc-calcs Wrote:  Is the HP-55 the only pre-80s calculator that does C->F/F->C temperature conversions natively?

Could the HP-41 (or any other model) made to have this conversion with an add-on module?

Thanks.

I used to use statistics for this: enter three known quantities for degrees C and the degrees F equivalents (-40, -40; 0, 32; 100, 212) in the statistics X and Y sum registers, and use the resulting trend line to get the answer given for any input. I did this on the HP-25, my first HP calculator. Sorry I don’t recall the exact steps, but it has been a few years (decades (not quite half a century)).

Not exactly what you were asking for, but it did bring back a happy memory for me.