I can cycle for a full 24 hours and can cover 400 km in that time.
I have never walked that long, but presuming I could, based on my usual pace of 5 km/hour, that would be ... 120 km. But chances are I'd slow down so maybe 100 km. Maybe only 80 km if my feet really started to hate me.
Given that I've walked 1130 km so far this year, that means I walk 21.7 km/week, and usually only for 5 days which amounts to 4.34 km/day. That, of course, varies. Some days I might walk 10 km ... others 2 km.
I cycle on the other 2 days each week, and sometimes also on the days I walk. This year I've cycled approx. 5 times the distance I've walked.
I work in the middle of the city. I do a combination of transit and walking to get to work, but once there, I can run out and do most of my errands. Most of my lunch walks are errand walks.
See this thread for further information:
http://www.bikeforums.net/living-car...alk-today.html