Are you trying to lose weight and want to know how long it will take to lose it all? Use our weight loss calculator and find out how long it will take to reach your weight loss goal. You can adjust the total amount of calories burned per day to see how fast or slow it will take. Losing weight slowly is the safest and most effective approach. A sensible weight loss program allows you to lose weight gradually. Focus on losing 1-2 pounds per week for the best results. To lose one pound, you must burn 3,500 calories more than you consume. This equates to burning 500 calories per day over the course of a week. Some of the best results can be obtained by reducing calories and adding cardio exercise to burn additional calories. Try reducing your calories by 300 per day and increasing daily activity to burn off an additional 200 calories. This will result in a weight loss of one pound per week and should produce great results!