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In Roofing Terms What Is A Square

November 29, 2025

2 min read

In roofing terms, a square is a unit of measurement that equals 100 square feet of roof space. Roofers use squares to measure roof size and calculate how much material they need. If your roof is 2,000 square feet, that is 20 squares. This makes it easy for contractors to give you price quotes and order the right amount of shingles or other materials. Understanding squares helps you talk about your roof like a pro.

How Do Roofers Calculate Squares?

Roofers measure your roof to find the total square footage, then divide by 100. For example, if your roof is 1,700 square feet, you have 17 squares. This simple math helps roofers order materials and plan the job.

According to the National Association of Home Builders, the average U.S. roof size is 2,647 square feet or 26.47 squares. Knowing this helps you understand typical roof sizes in America.

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Why Do Roofers Use Squares?

Squares make pricing simple and clear. When a roofer says “the cost is $400 per square,” you know exactly what that means.

Material costs are listed per square foot or per square. For example, according to RubyHome, basic asphalt shingles cost $4.25 to $4.95 per square foot. For a 1,700 square foot roof, that is 17 squares, so you can multiply $446 per square by 17 to get your total. Architectural asphalt shingles run $4.50 to $8.25 per square foot, which is also listed this way.

What Do Material Costs Look Like by Square?

Different roofing types have different costs per square. Here is a simple breakdown:

Roofing TypeCost Per Sq. Ft.Cost Per Square
Basic Asphalt Shingles$4.25, $4.95$425, $495
Architectural Asphalt$4.50, $8.25$450, $825
Metal Roofing$10.00, $17.05$1,000, $1,705
Copper Tiles$21.00, $39.70$2,100, $3,970

How Do Squares Affect Your Total Roof Cost?

Your total roof cost depends on how many squares you have and what material you pick. According to RubyHome, roof installation costs range from $4 to $40 per square foot. For a 1,700 square foot roof, that means $6,800 to $68,000 total. The average roof replacement cost is $9,526 according to RubyHome data.

If you need a new roof, ask your roofer how many squares your roof has. Then ask the cost per square for the material you want. Multiply those two numbers and you get your material cost. Add labor costs, and you have your total price. This makes shopping for roofs easier and helps you understand what you are paying for.

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Contact a qualified roof contractor for expert guidance on roof repair, replacement, or installation.