Roofing Material Calculator
Estimate all roofing materials needed: shingles, underlayment, drip edge, ridge caps, starter strip, nails, and ice & water shield. Supports 3-tab, architectural, metal panel, and standing seam.
Area as seen from above (building footprint)
Multiplier: 1.118. Roof Pitch Calculator →
Thicker, dimensional look. 30-50 year warranty. Requires 4 bundles per square.
Roof Complexity (Waste Factor)
Estimated from footprint (~164 ft)
(cold climates)
Complete Material List
Flat Footprint
1,500 sq ft
Pitch Multiplier
1.118x
6/12 pitch
Actual Roof Area
1,677 sq ft
Squares (with 7% waste)
17.9
16.8 before waste
Shingle Bundles
72
4 bundles/square
Underlayment Rolls
2
Synthetic underlayment rolls (10 sq/roll)
Drip Edge
17 pcs (10 ft each)
164 linear ft total
Ridge Cap Bundles
2
1 per 20 linear ft of ridge
Starter Strip
2 bundles
164 linear ft of eave/rake
Roofing Nails
5,743
~42 lbs (320/square)
About Architectural Shingles
Thicker, dimensional look. 30-50 year warranty. Requires 4 bundles per square.
Coverage per unit
4 bundles/sq
Underlayment
1000 sq ft/roll
Fasteners per sq
320
Ridge coverage
20 ft/bundle
How to Use This Calculator
Enter the roof footprint (the area as seen from directly above, which equals the home's floor plan area for a simple roof). Select the roof pitch — the calculator adjusts the footprint by the pitch multiplier to get actual roof surface area. Choose your material type and roof complexity to get a complete, accurate material list with waste included.
Formula Used
Roof Area = Footprint x Pitch Multiplier. Squares = Roof Area / 100. Materials are calculated per square with waste factor applied based on roof complexity.
Related Roofing Calculators
Best Roofing Software →Still measuring roofs by hand and writing estimates in the truck? Roofing software handles aerial measurements, material ordering, and customer follow-ups automatically.
Need to figure out what to charge?
7-channel breakdown with real cost-per-lead data — which channels actually pay back.
How to Get More Roofing Leads→Starting or growing your roofing business?
Our free startup guide covers licensing, LLC formation, insurance, pricing, and getting your first customers.
How to Start a Roofing Business→Free Software Guide for Roofing Professionals
Get our free guide comparing the best software tools for roofing businesses — with real pricing and honest recommendations.
No spam. Unsubscribe anytime.
Disclaimer
This calculator is for estimation purposes only. Results may vary based on local conditions, materials, and building codes. Always consult a licensed professional before making decisions based on these calculations. MyContractorTools is not responsible for any errors or omissions.