How many bundles of shingles do I need for 9 square?

To determine how many bundles of shingles you need for 9 square, you first need to know that one square covers 100 square feet. Since a standard bundle typically covers about 33.3 square feet, you'll need approximately 3 bundles of shingles per square. For 9 square, you would multiply 9 by 3, resulting in about 27 bundles of shingles needed. Always consider purchasing a little extra to account for waste or mistakes.