The number of calories in an 8-ounce steak depends on the cut of meat served, the method of preparation and whether the fat has been trimmed from the meat. An 8-ounce serving of top round steak, for example, has around 320 calories.
Some steaks are better than others when it comes to fat and calories. Eye of round, sirloin tip side, top sirloin and bottom round all contain fewer than 55 calories per ounce. Porterhouse steak and rib-eye steak have more calories and grams of fat than leaner cuts. An 8-ounce portion of rib-eye steak has 621 calories and 50 grams of fat. The number of calories in a steak can be reduced by trimming visible fat and using cooking methods such as broiling and grilling.