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What Is 1 Square In Roofing

November 29, 2025

2 min read

dilshadakram

One square in roofing is a unit of measurement equal to 100 square feet of roof area. Roofers use squares to measure how much material you need for your roof. It makes the job easier because roofing materials come in bundles that cover one square. If your roof is 2,000 square feet, that means you need 20 squares of material.

Understanding squares helps you talk to roofers and get fair prices. Most homeowners do not know about this term, so learning it will help you make smart decisions about your roof.

Why Do Roofers Use Squares?

Roofers use squares because it is fast and simple. One square equals 100 square feet, which is easy math. According to the National Association of Home Builders, the average U.S. roof size is 2,647 square feet or 26.47 squares. This makes it quick for roofers to estimate how much work they need to do.

Using squares also helps with pricing. When a roofer quotes you $446 per square, you know exactly what you are paying.

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How Much Does One Square Cost?

The cost of one square depends on what material you choose. According to RubyHome, roof installation costs range from $4 to $40 per square foot, or $400 to $4,000 per square.

Basic asphalt shingles cost the least. Premium materials like slate or copper cost much more. Here is a quick breakdown:

Material TypeCost Per Square
Basic Asphalt Shingles$425-$495
Architectural Asphalt Shingles$450-$825
Metal Roofing$1,000-$1,705
Slate Tiles$1,200-$2,200

How Many Squares Do You Need?

To find how many squares your roof needs, measure your roof size in square feet and divide by 100. Most homes have roofs between 1,500 and 3,000 square feet.

According to RubyHome, for a 1,700 square foot roof, you need between 17 and 68 squares depending on the material and complexity. A simple roof with asphalt shingles is cheaper than a complex roof with multiple angles and valleys.

Average Roof Replacement Cost

According to RubyHome, the average roof replacement cost is $9,526, with a range of $5,868 to $13,217. That works out to about 21 squares for an average home. DIY work can save about 50 percent, but mistakes often cost more money later.

Asphalt shingles are the most common choice. According to RubyHome, asphalt shingles dominate about 80 percent of roofing projects in the U.S., making them the most affordable option for most homeowners.

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Connect with an experienced roofing company to discuss your roofing needs and schedule an inspection.