Typical bundle order
Input
2,000 sq ft · 33.3 sq ft/bundle · 10% wasteOutput
≈ 66 bundlesceil(2200/33.3) = 66 bundles.
Roof area ≈ footprint sq ft × √(1 + (rise/run)²). A 6/12 pitch adds about 12% more area than the footprint.
Use the calculator form above with your measurements. Results update instantly in your browser — no data is sent to a server.
Roof area ≈ footprint sq ft × √(1 + (rise/run)²). A 6/12 pitch adds about 12% more area than the footprint.
Formula
See calculator inputs and results panel for step-by-step math.Pick a roof size preset or type your footprint / eave measurements.
Enter sq ft per bundle, panel, or roll from your product label.
Keep the 10% buffer on for valleys, hips, and cut waste.
Use bundles, linear feet, or sq ft in the results panel for your order.
Copy results or share a link with your contractor or supplier.
Use Roof Area or Pitch calculators first if you only know footprint dimensions.
Input
2,000 sq ft · 33.3 sq ft/bundle · 10% wasteOutput
≈ 66 bundlesceil(2200/33.3) = 66 bundles.
Input
6" rise · 12" runOutput
1.118× footprintsqrt(1+(6/12)²) ≈ 1.118.
Common real-world scenarios where this tool saves time.
2,000 sq ft roof at 33.3 sq ft/bundle with 10% waste ≈ 66 bundles.
1,800 sq ft at 32 sq ft/panel with buffer ≈ 62 panels.
160 ft perimeter eaves → order ~176 ft with 10% seam overlap.
120 ft eave × 1 ft depth = 120 sq ft soffit area.
Step-by-step chains that connect related tools for common tasks.
From footprint to order list.
| Pitch | 1,200 sq ft footprint | Roof area |
|---|---|---|
| 4/12 | 1,200 sq ft | ≈ 1,265 sq ft |
| 6/12 | 1,200 sq ft | ≈ 1,342 sq ft |
| 8/12 | 1,200 sq ft | ≈ 1,442 sq ft |
Multiply footprint by pitch multiplier — use Roof Area Calculator first.
Add 10–15% for valleys, hips, and starter strips.
Read sq ft per bundle on each wrapper — brands differ.
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One roofing square is 100 sq ft. Three-tab bundles often cover ~33.3 sq ft each — about 3 bundles per square.
10% is standard for simple gable roofs; 15% for complex hips and valleys.
Measure vertical rise over 12 inches of horizontal run — a 6/12 pitch rises 6 inches per foot.
Use Metal Roofing Calculator for panel counts, or enter panel sq ft in bundle mode tools.
Common K-style gutters ship in 10 ft sections — divide total linear feet by 10 and round up.
Measure from the wall to the outer edge of the fascia — often 12–24 inches (1–2 ft).
Yes — use Roofing Material Calculator for bundles plus underlayment roll counts.
No — it is a planning tool. Confirm quantities with your roofer or supplier before purchase.
Footprint and pitch inputs for roof area math remain on your device — EverydayTools does not store roof area calculator entries.
Estimates only — not professional roofing advice. Verify quantities with a licensed roofer before purchase.
Part of Calculator Tools
More free tools for the same workflow.
Free insulation calculator: area + sq ft per batt bag → bags to buy with waste buffer. Attic, wall, and crawl presets with opening deductions. Runs locally in your browser.
Free roof pitch calculator: Convert roof rise and run to pitch ratio (X/12), angle in degrees, and the footprint area multiplier used for material e Runs locally in your browser — no signup.
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Reviewed on 2026-06-28.