If you weigh more, you will burn more calories. The reason for this is the amount of mass you are moving in a given distance is greater than the amount of mass moved by someone with less weight. Multiply your weight in pounds by .75 to find your personal total calorie burn. This will tell you how many calories you are burning per mile.
Calories burned by jogging 1.2 miles will depend on your weight as well as how many miles per hour you are jogging. If a person weighs 140-160 pounds and they are jogging approximately 4-5 miles per hour, they have the potential to burn about 500-600 calories on average.
The above is pretty accurate. I have a link to a website where you can put in your personal info (Height, weight,etc.) and find out specifically how many calories you will burn. It does rely on how fast you go. In my ten minute mile, 121 lbs, 5'3, I burned 506 calories. :)
The amount of calories you burn depends on how much you weigh. You can go to a site where you can log in your height and weight and how many miles that you ran and it will help you to determine how many calories that you burned. There are also devices available that you can where while you are running that will calculate how many calories you burn while you are running.