John Martellaro at MacObserver got his protractor out and used those drawings that the City of Cupertino released this weekend to extrapolate the real size of Apple’s new HQ building. In a word, it is BIG.

Given that comforting sanity check, I measured the diameter of the Apple spaceship as 1615 ft, plus or minus a few ft., depending on where one places the ruler. That’s a radius of 807.5 ft.

The outside measurement on the plans is 760′ but the large outside shader structures could account for the additional size.

Interestingly, that is a bigger footprint than the world’s largest office building, the Pentagon, which at five stories tall, two basement levels and with a smaller courtyard, still has significantly more usable square footage.

Also (using our geometry skillz) plugging the 1615 ft diameter into a perfectly round circle, you get an outside circumference of just under a mile (5074 ft). That means taking some paperwork all the way to HR might be a lunch killer.

Update: Obama Pacman notes that Apple could install 3 full sized Football fields in the courtyard (below).

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