How fast does Pac-Man move?

Apparently he moves at 11 tiles per second, a tile is made up of an 8 x 8 pixel square. So he travels at 88 pixels per second.

You can find pretty much all of the information you need to find here, but you specifically want slide 48.

After some close examination by hand and by recording, Pac-Man moved a distance of 200 pixels in around 3.10 to 3.15 seconds. This comes out to around 8.00 to 8.05 tiles per second, which is about 64 pixels per second. Since I was on the first level, Pac-Man was at 80% of his full speed. With some math, it turns out Pac-Man moves exactly 80 pixels per second, or 10 tiles per second. Hope this helped.