35mm film ~ 10MP in my experience.
I reckoned that Kodachrome was a bit more, but you can't get that now :-(
Larger format film doesn't have quite the rsolution you would expect, the
larger films are not held flat enough in the image plane But medium
format and large format are still higher resolution that any digital
caemra you are likely to own. Not tht resolution is the only thing that
matters, of course
-tony