You should look at it in terms of what you eat - exercise = only eating that many
calories.
Just look at
calories in vs
calories out.
So yup, add your basic living
calories burnt + exercise =
calories out
then add your
calories in (anything you consume) and you get your deficit or surplus!
I'm not sure what a normal deficit to have when losing weight is. Try browsing the
stickies for this info!
It's great that you want to speed up the process but if you cut back too fast on your
intake you could end up feeling very hungry and then overeating.
What you could do is try just eating when hungry and measure how many cals that
totals and then go from there.
If you find that you eat about 2000 then you know that cutting back to 1600 may be a
bit much.