Metal Roofing Panel Calculator

Panel count and linear footage from net coverage width, custom mill-cut length, pitch multiplier, and waste — not shingle bundles

Use manufacturer net coverage width — not overall sheet width. Metal is sold by the panel, usually mill-cut to length. This calculator applies the same pitch multiplier as the shingle square tool (√(1+(rise/run)²)), then divides roof surface by each panel’s net coverage area (coverage width × panel length). Presets: standing seam ~16 in coverage (common residential range 12–18 in), exposed R-panel/PBR 36 in (MBCI published coverage), corrugated/5V ~24 in net. Confirm the data sheet for your profile. Waste for custom mill-cut is often 5–10% on simple gables and 10–15% on cut-up roofs — typically lower than asphalt because panels are ordered to length. Not a permit, not a trim takeoff, not a structural snow-load calc.

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Metal Panel Install Gear

A coverage-width takeoff is a number until you cut, seam, and fasten the panels. Snips, a hand seamer, and painted hex-washer screws are how standing seam and exposed-fastener roofs leave the truck.

Metal Roofing Screws

Self-tapping hex-washer head screws with sealing washers for exposed-fastener / R-panel installs. Standing seam uses concealed clips instead — still keep stitch screws for trim.

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Offset Aviation Snips

Malco M2006 left-offset snips for flashing, valleys, and the last panel cut. Metal panels are not shingles — you trim sheet, not tear tabs.

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3" Hand Seamer

Malco S2R hand seamer for folding hem edges and detailing standing-seam / trim bends on the roof when a full seaming machine is not on the job.

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Malco TS1 TurboShear sheet metal attachment

TurboShear Attachment

Malco TS1 drill attachment for long straight cuts in sheet. Faster than hand snips when you are trimming a stock-length panel down to a hip cut.

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Roofing square shingle bundle calculator

Comparing to Shingles?

Asphalt is sold by the square and the bundle. Run the shingle takeoff before you pick a material.

Open Shingle Bundle Calculator →

Run the Panel Count

Coverage width, custom panel length, pitch multiplier, and waste — not a shingle-bundle worksheet.

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How to Use This Metal Roofing Panel Calculator

Enter plan length and width plus pitch (or a measured surface area), pick standing seam / R-panel / corrugated to seed coverage width, type the mill-cut panel length, and set waste. The calculator multiplies footprint by the pitch factor, divides by each panel’s net coverage area, applies waste, and rounds up to whole panels — then prints total linear footage.

Panels = ceil( roof sq ft × (1 + waste%) × 144 / (coverage inches × panel length feet) )

Coverage vs nominal width: guide. Estimating mistakes: troubleshooting. Metal vs asphalt: comparison. Shingle bundles instead: shingle calculator.

Metal Roofing Panel Calculator