So I've been doing some experimenting and I'm wondering if anyone else has played with this: How many pixels in width should be supplied for the average character or combination of characters.

I'm trying to figure out how wide to make my table columns in pixels based on the maximum number of characters that are in that column. I know that I can just not specify a width and it will fill out the table fairly nicely most of the time, but what if I want it to be exact?

Thoughts, suggestions?