I don't know, probably only 20 to 30 miles including my commute which is about 9 miles roundtrip. I haven't used a bike computer since back in the late 20th century. It's nice to have the stats, but I broke the few I tried to use. I lock up too often and inevitably snag the wire with my lock or smash the unit on a parking meter. I can't have anything nice because I'll only break it.
I'm going to try and install a GPS tracking app to my Windows Mobile device, so I can see where I went each day and how far.