Weight Loss - How Many Calories Do you Need to Burn

It is always good to burn calories to loose weight. The question is how many calories do you need to burn each week so that you loose weight? But the real question is intake of calories because if you take in say 2500 calories and you only want to have 200 per day, then it is very hard to bur off 500 calories. A lot of work out machines have a calorie counter but every body burn calories at a different rate so they can be not as accurate to use.