Roof Shingle & Material Calculator

Estimate roof area, roofing squares, shingle bundles, underlayment, waste, and material cost before buying materials or comparing roof quotes.

Roof material

Roof shingle and material calculator

Estimate roof area, shingle bundles, underlayment rolls, waste, and material cost before comparing roof quotes.

What this roof calculator estimates

The calculator estimates roof area from footprint and pitch, then converts that into roofing squares, shingle bundles, underlayment rolls, waste, and a material total.

What to verify before hiring a roofer

Ask how the quote handles tear-off, decking replacement, flashing, drip edge, ventilation, ice shield, cleanup, disposal, permits, workmanship warranty, and manufacturer warranty registration.

Common questions

Does roof pitch change shingle quantity?

Yes. A steeper roof has more surface area than the flat footprint. The calculator applies a pitch multiplier before adding waste.

Does this replace a roofing quote?

No. It estimates materials only. Tear-off, decking repair, flashing, ventilation, permits, safety setup, disposal, labor, and warranty terms must still be quoted.

Can I use metric roof measurements?

Yes. Switch to metric to enter meters and square meters. Roofing squares are still shown because many shingle systems price and package materials that way.

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