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Asphalt Shingle Calculator
Calculate shingle bundles, squares, weight, and total installed cost — including starter strips, ridge cap, and tear-off.
Educational calculators — always consult a licensed professional before making financial decisions.
Small home under 1,200 sq ft footprint. Actual roof area ~1,300–1,500 sq ft with pitch factor.
Flat single-layer shingles. Cheapest option ($3.50–$5.50/sq ft). 15–20 year lifespan; limited wind resistance.
2 or 4 plain sloping sides with no valleys, dormers, or hips. Minimal cutting waste.
No existing shingles to remove. Applies to new construction or fresh decking.
Total Installed Cost
$4,130 – $6,370
Materials, labor, tear-off, and accessories
Material List
Cost Breakdown
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Material costs fluctuate. Labor varies by region. Get 3 quotes before committing to a contractor.
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How it works
Enter roof dimensions
Input length, width, and pitch — or total square footage if you know it.
Add waste factor
Select 10–15% for simple roofs, up to 20% for complex hips and valleys.
Get squares and bundles
See how many roofing squares, shingle bundles, and nails you need to buy.
About this calculator
How many bundles of shingles do I need?+
Divide your roof area by 100 to get squares, multiply by your waste factor (1.10–1.20 depending on complexity), then multiply by 3 bundles per square. Example: 2,000 sq ft ÷ 100 = 20 squares × 1.10 = 22 squares × 3 = 66 bundles.
What is the difference between 3-tab and architectural shingles?+
3-tab shingles are flat single-layer strips costing $350–$550 per square installed, with a 15–20 year lifespan. Architectural (laminated) shingles are multi-layer, last 25–30 years, and cost $450–$700 per square installed. The modest price difference makes architectural shingles the standard choice for most homeowners.
How much does asphalt shingle installation cost per square?+
Asphalt shingle installation costs $350–$550 per square for 3-tab and $450–$700 per square for architectural shingles. A roofing square equals 100 sq ft. A typical 2,000 sq ft home roof (about 20–25 squares) costs $9,000–$17,500 fully installed including tear-off, underlayment, and disposal.
What waste factor should I use for shingle calculations?+
Use a 10% waste factor for simple gable roofs with few valleys or hips. Use 15–20% for complex roofs with multiple valleys, dormers, skylights, or steep pitches. Always order at least 10% extra to account for cuts and potential future repairs with matching shingles.
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Back to the calculator ↑Asphalt Shingle Calculator is built and maintained by the RealCostIQ editorial team. Cost ranges and rates are checked against published industry data and contractor quotes, and revised when the underlying figures move. Read our data methodology or more about who builds this. Every calculation runs in your browser — no account, and none of your inputs are stored.
Cost ranges and rates here are checked against contractor quotes and published industry data. If a number still looks off, email Support@RealCostIQ.com and we'll review and fix it.