pedometer calorie count based on weight???

ThinnerHill

OK So I have my pedometer that I wear that figures calories burned for my weight and when I go to add that to my exercise it doesn't match up with anything on the database. for example my pedometer says that I walked 1.44 miles and burned 147 calories, but I don't know how I should key that in. I didn 't keep track of how long I walked as it was split up by a couple walks during the day so should I just keep playing with the minutes until I get it to read the same amount of calories? I'm so confused.