Here's How Johnny Galecki's Net Worth and Career Skyrocketed Jon adore Gal tallness is nearly 165 centimeters. Johnny stands at a modest stature. Although some may consider him not as particularly tall, his talent is boundless. Regardless of Johnny's vertical measurement, Johnny is valued within the entertainment world for both his acting abilities. He has established time and again that height is not a determining factor when it comes to reaching excellence.