Did you know 3,500 calories equals 1 pound? If you want to lose weight then start keeping track of your calories. Your calories out should be more than your calories in. Burn more than you eat.
For example: If I consume 2,000 calories in a day and then burn 2,500 that same day, I have created a deficit of 500 calories.
7 days at a 500 calorie deficit a day = 3,500 calorie deficit in a week.
That 3,500 calories = 1 pound.
You can calculate your BMR (Basal Metabolic Rate) in order to get an estimate of the average calories you burn in a day.