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Roofing Calculator – Estimates roofing material (in squares) needed ...

The Roofing Calculator estimates roofing material (in squares) needed based on roof area and pitch. This Roofing Calculator estimates the materials or values you need for common home projects. Always add a waste margin to material estimates before placing an order.

The formula behind this calculator: Roof area is adjusted by a pitch multiplier, then divided by 100 sq ft to get roofing 'squares'. As a practical example: A 1,500 sq ft roof footprint with a moderate pitch might need about 17-18 roofing squares. All results are calculated instantly in your browser — no data is stored or transmitted.

Roofing Calculator FAQ

What does the Roofing Calculator calculate?

Estimates roofing material (in squares) needed based on roof area and pitch.

Should I add a waste percentage to material estimates?

Yes — always add 5–15% depending on the material and installation pattern. Flooring and tile in particular require extra for cuts and breakage.

Can I use this to estimate contractor costs?

As a starting point for material quantities. Contractor labour costs depend on your location, complexity, and the specific contractor's rates.

Is this calculator free?

Yes — all CalcHive calculators are free with no sign-up, no account, and no usage limits.