๐งฑ Construction
Roofing Calculator
Roofing is measured in squares, where one square is 100 square feet of finished roof. Shingles come three bundles to the square, and a pitched roof has more surface area than its footprint โ a 6/12 pitch adds about 12 percent.
How it works
Roof footprint area
Roof pitch (rise per 12)
Waste allowance
Price per square
Roof surface area
Roofing squares
Bundles of shingles
Underlayment rolls (10 sq each)
Estimated material cost
Frequently asked questions
How do I use the Roofing Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.