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Shingle Bundles Calculator

Convert roof area into squares and shingle bundles with a waste factor.

Results

Adjusted area (sq ft)
2200.00
Roof squares
22.00
Bundles (3 per square)
66.00

How to use this calculator

  1. Measure or approximate the total roof area in square feet using plan dimensions or a roof measurement tool.
  2. Enter the roof area and choose a waste allowance percentage (higher for complex roofs).
  3. We calculate the adjusted area, roof squares, and estimated bundle count assuming 3 bundles per square.
  4. Round the bundle count up to the next whole number and adjust for any special shingle products as needed.

Inputs explained

Roof area (sq ft)
Total surface area of the roof to be covered with shingles, in square feet. Include all planes you plan to shingle. If needed, sum length × width for each section.
Waste allowance (%)
Extra percentage added to cover starter strips, ridge/hip shingles, cut waste, and damaged bundles. Simple gable roofs may use 5–10%; complex hips/valleys may need 10–15% or more.

How it works

We start with your measured or estimated roof area in square feet.

We apply your waste allowance percentage to account for starter courses, ridge caps, hips/valleys, and cutting waste: adjusted area = roof area × (1 + waste%).

We convert the adjusted area into roofing squares by dividing by 100 (since one square = 100 sq ft).

We estimate the number of bundles by multiplying squares by 3, assuming three standard bundles per square for typical asphalt shingles.

You can then round the bundle count up to a whole number to place your order.

Formula

Adjusted area = Roof area × (1 + Waste% ÷ 100)\nSquares = Adjusted area ÷ 100\nBundles ≈ Squares × 3

When to use it

  • Estimating how many squares and bundles of asphalt shingles to order for a new roof or re‑roofing job.
  • Adding a waste buffer for roofs with hips, valleys, dormers, and other complexity without under‑ordering.
  • Providing a quick takeoff before getting detailed supplier or contractor quotes.
  • Comparing how different waste assumptions (for example, 8% vs 15%) change the bundle count and material costs.

Tips & cautions

  • Use a higher waste percentage for roofs with many hips, valleys, dormers, or intersecting planes; simple gable roofs can use the lower end of the range.
  • Include ridge caps and starter courses in your waste estimate or plan to order separate ridge/hip products if your brand requires them.
  • Round bundle counts up—suppliers sell whole bundles, and extra shingles can be useful for future repairs.
  • Check the packaging for your specific shingle product; some heavy or specialty shingles may cover slightly more or less than 3 bundles per square.
  • Assumes 3 bundles per square, which is typical for many asphalt shingles but may not hold for all products; always verify coverage with manufacturer specs.
  • Does not include underlayment, ice and water shield, flashing, nails, vents, or other roofing accessories.
  • Uses a single waste percentage; actual waste can vary across different roof sections depending on complexity and layout.

Worked examples

2,000 sq ft, 10% waste

  • Adjusted area = 2,000 × 1.10 = 2,200 sq ft.
  • Squares = 2,200 ÷ 100 = 22 squares.
  • Bundles ≈ 22 × 3 = 66 bundles (round up as needed).

1,500 sq ft, 12% waste

  • Adjusted area = 1,500 × 1.12 = 1,680 sq ft.
  • Squares = 1,680 ÷ 100 = 16.8 squares.
  • Bundles ≈ 16.8 × 3 ≈ 50.4 → plan on at least 51 bundles.

Deep dive

This shingle bundles calculator converts roof area and a waste factor into roofing squares and bundle counts so you can order shingles confidently.

Enter roof area and waste allowance to estimate how many squares and standard bundles you need, then round up for a safe material buffer.

Ideal for roofers, contractors, and DIY homeowners planning asphalt shingle orders without spending hours on manual calculations.

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This shingle bundles calculator provides approximate estimates based on simple coverage assumptions. It does not replace detailed roof measurements, manufacturer coverage data, or contractor judgment. Always verify quantities with your roofer and product specs before ordering materials.