HOME & RENOVATION

Roofing Calculator

Estimate your roof area, roofing squares, and how many asphalt shingle bundles to buy, including extra material for cutting and waste.

Roof measurements

Choose whether to calculate the roof area from building dimensions or enter the actual sloped roof area if you already know it.

How would you like to measure the roof?

Building length (ft)Building width (ft)

Roof styleRoof pitch (rise per 12 in. run)

This estimate assumes a simple rectangular building with a uniform roof pitch. Building dimensions do not include roof overhangs. Add overhangs to the dimensions before entering them if you want them included.

Shingle details

Coverage per bundle (ft²)

Check the product packaging for the actual coverage per bundle. Many standard asphalt shingles cover about 33.3 ft² per bundle, but coverage varies by product.

Extra material for cutting and waste

Material cost (optional)

Enter the price of one shingle bundle to estimate material cost.

Price per bundle (US $)

Back to Home & Renovation

Roof measurements

Shingle details

Material cost (optional)

Your roofing estimate