Alcohol is considered a macronutrient in that it provides energy (about 7 calories per gram. The equivalent of a 1-ounce shot of liquor is approximately 80 to 90 calories. Update Date: 02/06/2008Christos Ballas, MD, Attending Psychiatrist, Hospital of the University of Pennsylvania, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.