Hoofing It

Yesterday evening I walked for an hour and a half, Central Square to Powderhouse Square, basically. Tracing it on Yahoo Maps, it says it's only 3.24 miles. I feel sort of ripped off. It felt like 5.

I have a pedometer, but I haven't been able to calibrate it correctly. I wonder if any sporting goods stores sell pedometers and calibrate them for you in-store.