Original: From 1969-1978 , this record was held by the John Hancock Center , whose antenna reached a height of 1,500 ft ( 457.2 m ) , or 49 ft ( 14.8 m ) taller than the Sears Tower 's original height of 1,451 ft ( 442 m ) .
Simplified: It has 108 levels , and from the ground to the roof it is 442 m ( 1,451 ft ) tall . From the ground to the top of the taller antenna is 527 m ( 1,730 ft ) .