setting 100pt text to equal 1 inch

I’m not sure how it I did it, but on my old computer, whenever I set my font size to 100 pts., capital letters would measure out to 1 inch high on my project window ruler. It was nice because, 150 pts. was 1.5”, 175 pts. was 1.75”,  200 was 2”, etc. When I got my new computer, I set all my preferences to the same values, but now I have to use 72 pt. fonts to get 1” letters. I’d like to recapture the convenience of the simple calculations, so any help would be greatly appreciated!