Flank steak is a cut of beef from the long muscle along the belly of the cow, under the ribs. Because of the flank’s location and function in the animal, it’s very lean and reasonably low in calories compared to other cuts of beef.
Information on Calories
For right around 160 calories, you can have 3 ounces of plain grilled flank steak. That portion size of flank steak has 7 grams of fat. Since all fats have 9 calories per gram, you’ll get about 63 calories from fat. The big chunk of the calories in grilled flank steak stem from protein -- 23.5 grams or 157 calories from protein, since each gram has 4 calories. You won’t get any carbohydrates from flank steak.