'The Big Bang Theory' star Johnny Galecki suffers MEAWWJonathan adore Galecki height is about 65 inches. He is at a modest stature. While some might think of him not to be excessively tall, his skills is limitless. Regardless Johnny's upright dimension, Johnny is admired within the entertainment world for his acting abilities. He has established time and again that one's stature doesn't dictate success when it comes to attaining greatness.