Question: how many calories in half a chicken breast grilled?
Answer: A 3.5-ounce (100-gram) serving of chicken breast provides 165 calories, 31 grams of protein and 3.6 grams of fat (1). That means that approximately 80% of the calories in chicken breast come from protein, and 20% come from fat. Keep in mind that these amounts refer to a plain chicken breast with no added ingredients.