With Calories Burned - Exercise Calculator, you can accurately determine calories burned by all forms and variations of walking, running, and swimming. Count how many calories you burn doing your favorite activities or how long you should do an activity to lose weight. How many calories did you burn? Find out how many calories you burn doing different activities. The calculator uses the type of physical activity and your basal metabolic rate to calculate calories burned, so gives a personalised result. Knowing roughly how many calories you expend doing different activities can help you with weight loss or maintenance.