The Running Calorie Calculator estimates the total number of calories burned while running based on your body weight, running distance, and speed. It uses the formula Calories = Weight × Distance × (Speed ÷ 10), which approximates the energy cost of running at different paces. Faster speeds and longer distances result in more calories burned, as they require greater energy output. This calculator helps runners monitor their calorie expenditure, plan workouts, and manage fitness or weight-loss goals effectively.