I heard that a good rule of thumb is to take your goal weight x 10. So wanting to get down to 180, I should consume about 1800 calories a day. Makes sense to me. I lift weights alot and three times a week I like to do an hour on the treadmill at 4 MPH. An hour on the treadmill at 4 MPH burns approximately 500 calories. Does that mean it's okay to take in an additional 500 calories. Maybe even necessary?