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The number of roofing squares quoted or ordered.
A square is the roofing trade's unit of area. It is always 100 square feet of roof surface, measured on the slope rather than on the plan.
Roof area
2,000 sq ft
1 roofing square = 100 sq ft, by trade definition. Roof area is measured on the slope, so it always exceeds the building's footprint on a pitched roof.
- Conversion factor applied
- 100 sq ft per square
They open the calculator with your figures already in it
Roofing Squares to Square Feet Calculator: 2,000 sq ft — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- A roofing square is defined as 100 square feet of roof surface area
- Shingle bundles are commonly packaged three to the square for standard three-tab and architectural products
Inputs used
- Roofing squares (squares)
- 20
Intermediate steps
- Conversion factor applied
- 100 sq ft per square
Confidence note: 1 roofing square = 100 sq ft, by trade definition. Roof area is measured on the slope, so it always exceeds the building's footprint on a pitched roof.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-08-26 · in the site-wide review of 2026-09-06 · v1.0.0
Regulatory standards & verification citations2
- A roofing square is defined as 100 square feet of roof surface area
- Shingle bundles are commonly packaged three to the square for standard three-tab and architectural products
Cite this page
Your workspace
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Roofing is quoted in squares and measured in feet, so this conversion is how a homeowner checks a contractor's figure against their own tape. One square is one hundred square feet, always. The catch is that roof area is the sloped surface, not the plan area of the building beneath it: a six-in-twelve roof has about twelve percent more surface than its footprint, and a twelve-in-twelve has over forty percent more. A quote that matches your plan-area measurement exactly is more likely to be wrong than right. Squares also describe area rather than material, so waste for hips, valleys and starter courses is added on top of the converted figure, not contained within it.