In roofing, 1 square is 100 square feet. This is the standard measurement that roofers use to estimate roof size and calculate costs. When you hear a roofer talk about squares, they mean bundles of shingles that cover 100 square feet. Understanding this unit helps you know how big your roof really is and what you will pay for repairs or replacement. The average U.S. roof size is 2,647 square feet, or about 26.47 squares, according to the National Association of Home Builders. Knowing how to measure your roof in squares makes it easy to get accurate price quotes from contractors.
Why Do Roofers Use Squares?
Roofers use squares because it is simple and fast. Instead of saying “my roof is 2,647 square feet,” you can say “my roof is 26.5 squares.” This saves time and makes math easier.
Squares also make pricing clear. When a roofer quotes you a price per square, you know exactly what you are paying. A typical asphalt shingle costs between $4.25 and $8.25 per square foot, according to RubyHome. This means one square of basic asphalt shingles costs $425 to $825.
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How Do You Calculate Roof Squares?
Calculating roof squares is easy. You measure your roof in feet, multiply the length by the width, then divide by 100. For example, if your roof is 50 feet long and 40 feet wide, that is 2,000 square feet, or 20 squares.
You can also use Google Maps or ask a roofer to measure for you. Many contractors offer free estimates that include roof size in squares.
What Does 1 Square Cost?
The cost of one square depends on the material. Here are common roofing materials and their cost per square:
| Material | Cost Per Square Foot | 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 | $10.00, $17.05 | $1,000, $1,705 |
| Clay Tiles | $12.00, $24.75 | $1,200, $2,475 |
How Many Squares Is My Roof?
To find how many squares your roof is, measure the length and width. Multiply them together. Then divide by 100.
Example: A roof that is 60 feet long and 40 feet wide has 2,400 square feet. That is 24 squares. According to RubyHome, roof installation costs range from $4 to $40 per square foot. For a 1,700 square foot roof, that is 17 squares, costing between $6,800 and $68,000 depending on the material you choose. The average roof replacement cost is $9,526, according to RubyHome.
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Talk with a local roofing services to review your options and get a detailed estimate for your project.