A reader has performed more detailed measurements of the Tesla Shanghai Megapack factory. He has dimensions of 450 meters by 180 meters (1476 feet X 590 feet).

This would be 870,800 square feet versus the 440,000 square feet of the Lathrop California megapack factory. This means almost exactly double.

The Tesla Shanghai megapack factory will also have two other buildings which will add another 300,000 square feet.