I’ve probably given some nutritionists and doctors chest pains by oversimplifying this much so let’s move on to the calories you’ll burn sightseeing. To get an idea of how much you’ve walked after-the-fact you can use Map My Run. You can’t begin to accurately calculate how many calories you’ve burned if you don’t know how far you’ve really walked. Serious traveling runners and walkers can take a look at the various nondescript GPS watches like the Garmin Forerunner 405 for accurate distance measurements. Adding To All Up, With BonusesWe now have three of the four key variables (pace, distance, and time) to calculate how many calories you’ve burned.