fitbit is good for that. Also, there is an iphone app called map my run - it tells you your route and if you put in your personal info - it tells you how many cals. you likely burned, time took to complete, time per mile, incline etc. It will also transfer to the website & vice versa, I use it during my runs.
You just start the app at the beginning of your run/walk and go from there - I wear mine on my arm during my runs.
Last edited by lm3898; 05-01-2012 at 12:52 PM.