Ezekiel Chapter 42 Vs. 16

 The Temple's Chambers

He measured the east side with the measuring reed, five hundred reeds, with the measuring reed round about. Eze 42:16

the measuring reed... A measure of 10 feet 6 inches, or 6 long cubits.

five hundred reeds,... The Septuagint reads: "five hundred cubits with the measuring reed" instead of "five hundred reeds." The Moffatt, Berkeley, and a few other versions and most commentators agree with this rendering; but here and in versions of Fenton, Young, and Rotherham it says "reeds" or "rods." Five hundred reeds would be 5,250 feet, nearly a mile square. If reeds instead of cubits is the true measurement in this passage, then we can make a new figure of a larger plot of ground around the 500 cubits mentioned in the measurements of these chapters. The wall around it might enclose landscaping, gardens, flowers and shrubs—nothing is said about what occupies such a space. The only reference is to a difference between a profane place and the sanctuary which is definitely the 500-cubit square of these many measurements (Eze. 42:20).

Again a reed is around 10 feet so this is almost a mile. This would be between 4500 and 5250 feet, according to how long a reed is. He measured the east wall first, keeping in mind the above.

The complex was a square measuring 875 feet (500 cubits) on each side. The total area occupied by this temple area was 765,625 square feet — enough square feet for more than 13 football fields!