What is a roofing square?

A roofing square is a standard unit of measurement in the roofing industry. One square equals 100 square feet of roof surface. Roofing contractors use squares to calculate how much material is needed for a project. For example:

• A 1,500 sq. ft. roof = 15 squares.
  
• A 2,000 sq. ft. roof = 20 squares.
  

When you receive an estimate, you’ll often see the cost listed “per square,” which helps standardize pricing for shingles, underlayment, and installation.