A T-bone steak is a cut of beef that contains a T-shaped bone with meat on both sides. It is cut from the short loin of a cow and includes a small portion of the tenderloin. A T-bone steak can weigh anywhere from 12 to 16 ounces.
The number of calories in a T-bone steak depends on the size of the steak and the amount of fat it contains. A 12-ounce T-bone steak that is 1 inch thick has approximately 700 calories. If you remove the bone and trim all the visible fat, this same steak will have about 500 calories.