The Calorie Burn Calculator estimates the total calories burned during physical activity using your body weight, exercise duration, and the type of activity you perform. It applies the formula Calories = MET × Weight (kg) × Time (hours), where the MET (Metabolic Equivalent of Task) value represents the energy cost of the activity. This tool helps track how much energy is expended in different exercises, allowing users to manage workouts, set fitness goals, and balance calorie intake and expenditure effectively.