How long does it take to burn 100 pounds?

1 pound roughly equates to 3500 calories. This means if you eat 3500 calories more than what your body uses, you'll put on a pound in weight. To get rid of excess weight, you need to do the opposite. So, if you want to burn 100 pounds, you'll have to burn 350 thousand calories. A safe rate of weight loss is about a pound a week, depending on your current height, weight, and level of activity. You need to work out your BMR (there are various diet and fitness sites that will give you an equation to do this) and then aim for 500 cals beneath this each day. A great way to boost your BMR is to take up running. It's completely free and although you'll feel like a fool at first, stick with it for a few months and you'll find the weight just drops off! Stay motivated!