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What Is Roofing Square

November 29, 2025

2 min read

dilshadakram

A roofing square is a unit of measurement that equals 100 square feet. Roofers and contractors use squares to measure roof size and calculate costs. For example, a roof that is 2,000 square feet equals 20 squares. This simple measurement helps homeowners understand their roof better and get accurate quotes from contractors. Knowing about squares is key when budgeting for roof repair or replacement.

Why Do Roofers Use Squares?

Squares make it easy for contractors to talk about roof size. Instead of saying your roof is 2,647 square feet, they say it is 26.47 squares. This makes the math faster and clearer for everyone.

The average U.S. roof size is 2,647 square feet or 26.47 squares. According to the National Association of Home Builders, this standard helps contractors estimate time and materials.

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How to Calculate Your Roof in Squares

The math is simple. Measure your roof length and width. Multiply these two numbers to get total square feet. Then divide by 100 to get squares.

For example, a 1,700 square foot roof equals 17 squares. This helps you compare roofing costs fast. According to RubyHome, roof installation costs range from $4 to $40 per square foot, which means a 1,700 sq. ft. roof costs $6,800 to $68,000.

Material Costs Per Square

Different roofing materials cost different amounts per square. Here is a quick guide:

Material TypeCost per Sq. Ft.Cost per Square (100 sq. ft.)
Basic Asphalt Shingles$4.25, $4.95$425, $495
Architectural Asphalt$4.50, $8.25$450, $825
Metal Roofing$5.50, $17.05$550, $1,705
Slate Tiles$12.00, $22.00$1,200, $2,200

Average Roof Replacement Cost

According to RubyHome, the average roof replacement cost is $9,526. Most homes pay between $5,868 and $13,217.

A 1,700 square foot roof is about 17 squares. Using per-square costs, you can estimate your total bill quickly. Asphalt shingles cost the least. Slate and copper cost the most. Understanding squares helps you shop for the best deal on your roof replacement.

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Work with a professional roofing company to protect your property with quality roofing solutions.