This calculator will determine how many calories you burn each day based on your age, sex, height, weight and current level of activity. When selecting your activity level use:

Sedentary (little or no exercise)
Lightly active (light exercise/sports 1-3 days/week)
Moderatetely active (moderate exercise/sports 3-5 days/week)
Very active (hard exercise/sports 6-7 days a week)
Extremely active (very hard exercise/sports & physical job or 2x training)
This is referred to as your basal metabolic rate or BMR calculation and tells you: How Many Calories Do I Burn a Day?