One Bundle Of Shingle, What Will They Cover?

One square is 10ft x 10ft and contains 100 sq. Ft.
One bundle of 3 tab shingles contains 33 1/3 sq. Ft. Or 3 bundles to one square.

Three bundles of shingles will cover one square.  One square is a 100 square feet.  So one bundle will cover approximately 33 square feet.

No body as long as I know one bundle of shingle covers one 'square' which is 10' by 10' [or 100 sq. Ft.]. This is the coverage area for it and for further information click on the link: Bundle Of Shingle