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Glam Journal

What does 20 squares mean in roofing?

Author

Ava White

Updated on April 07, 2026

What does 20 squares mean in roofing?

Roofing Square Conversion Calculator This is pretty simple; here’s an example: If your roof is 2,000 sq. feet, then you will have 20 squares. (2,000 / 100 = 20).

How much does a square of roofing cover?

A roofing square is equal to 100 square feet of the roof. To determine the number of squares on the gable roof example in this post, divide its total of 2400 square feet by 100 (2400 ÷ 100 = 24). This means you would need 24 squares of shingles to cover that roof.

How big is a square in a roof?

Measuring in squares is unique to the roofing industry—for homeowners, understanding how these measurements work can be an unfamiliar but vital part of planning for your roof repair or replacement. What Is a Roofing Square? In roofing, one square equals 10 X 10 ft., or 100 sq. ft.

How big is a square in square feet?

In roofing, one square equals 10 X 10 ft., or 100 sq. ft. This unit of measurement determines how many shingles you’ll need for every 100 sq. ft. of rooftop. As you prepare for your roofing project, you’ll use squares to determine the amount of roofing materials you need, from asphalt shingles down to the underlayment.

What’s the difference between Square and row of shingles?

Shingles are the building block of many roof styles, as contractors attach them to plywood sheathing to protect the roof from the elements. A square is the number of shingles it would take to cover 100 square feet of roof area with each row of shingles covering the tabs of the layer below it.

How do you figure out the square footage of a roof?

After taking a few simple measurements, you can figure out the area of your roof by sketching a rough diagram and breaking the roof up into smaller sections, which you can then add together to get your square footage grand total.

What is the formula for figuring roofing square?

1 roof square = 100 square feet ; The length (l) times the height (h) of a triangle is twice its area (A2). So if you divide your answer of a product of length times height by two, you will get the area of a triangle. Now that the basic concept has been covered, let’s take a look at a more complex roofing system.

How much does a square of roofing cost?

A square is equal to 100 square feet of roofing surface. Based on the $350 to $550 per square pricing range, you can expect to pay between $6,000 and $9,350 for a typical 17 squares asphalt shingle roof replacement project.

How many squares of roofing do I Need?

A square is an area of roof which measures 100 square feet. To determine the number of squares on the gable roof above, simply divide its total of 24,000 square feet by 100. The result is 240, and this means you would need 240 squares of shingles to cover that roof.

How do you convert square feet to roofing squares?

To convert the square footage to roof squares, divide the square footage by 100. The roof surface area would be 24. If you use ground measurements to determine your roof squares, you will need to also compensate roof overhang and slopes to get an accurate count.