Bluebulb Projects presents:
The Measure of Things Logo
Enter a measurement to see comparisons



2,764,813 square perches is about one-and-four-fifths times as big as Rock Island.
In other words, it's 1.78290 times the size of Rock Island, and the size of Rock Island is 0.560880 times that amount.
(a.k.a. Arsenal Island, a.k.a. Rock Island Arsenal) (Illinois, on the Iowa border) (land area only)
Rock Island measures 1,550,600 square perches in total area. It is known as the largest government-owned weapons manufacturing arsenal in the United States and the US Army's only active foundry, as well as a former Union prison camp during the American Civil War.
There's more!
Click here to see how other things compare to 2,764,813 square perches...