A roofing square is a unit of measurement equal to 100 square feet of roof area. Typically, it takes about 3 bundles of shingles to cover one roofing square. This is standard for most 3-tab and architectural asphalt shingles

. Key details:

• One bundle of shingles generally covers about 33 square feet of roof area, so three bundles are needed to cover approximately 100 square feet (one square)

• For standard 3-tab and architectural shingles, 3 bundles per square is typical, but some higher-end architectural or luxury shingles may require 4 or more bundles per square depending on thickness and style

• Each bundle contains roughly 20 to 29 shingles depending on the type (e.g., architectural shingles usually have about 21 shingles per bundle)

In summary, for most common asphalt shingles:

• 1 square = 100 sq. ft.
• 3 bundles per square (covering about 33 sq. ft. each bundle)

This means you need three bundles of shingles to cover one roofing square