Metal Roof Calculator

Types of Metal Roofing

Metal roofing comes in several panel profiles, each suited to different budgets, aesthetics, and structural requirements. Understanding the differences helps you choose the right system before you calculate materials.

• Standing Seam: Panels interlock at raised seams that run vertically up the roof slope. Hidden fasteners prevent leaks and allow thermal movement. The premium option at $8–$14/sq ft installed, standing seam is common on modern homes and commercial buildings.
• Corrugated Metal: The wavy, sinusoidal profile is the most recognizable and the most affordable at $3–$6/sq ft. Widely used on agricultural buildings, sheds, and rustic-style homes. Exposed fasteners require periodic inspection.
• R-Panel (PBR Panel): A structural standing-rib panel with exposed fasteners, popular for commercial and agricultural applications. Cost falls between corrugated and standing seam at $4–$7/sq ft installed.

How to Calculate Metal Roofing Panels

Calculating metal roofing panels requires three adjustments beyond a simple floor-plan measurement:

1. Pitch multiplier: A sloped roof has more surface area than its footprint. Multiply the flat footprint area by √(1 + (rise/12)²). A 4/12 pitch adds about 5.4% more area.
2. Panel coverage: A 16-inch-wide panel covers 1.33 ft of horizontal run per panel. Divide total slope area by coverage per panel to get panel count.
3. Waste factor: Add 10–20% for cuts, overlaps, valleys, and hips. Simple gable roofs need only 10%; complex roofs with multiple hips may need 20%.

Our calculator applies all three steps automatically. Enter your dimensions above and results update instantly.

Metal Roof Cost per Sq Ft

Material costs below are for panels only and do not include underlayment, fasteners, trim, or labor (which typically adds $3–$6/sq ft).

Panel Type	Material Cost / Sq Ft	Installed Cost / Sq Ft
Standing Seam	$4–$10	$8–$14
Corrugated	$1.50–$3.50	$3–$6
R-Panel	$2–$4	$4–$7

Frequently Asked Questions

How much does a metal roof cost per square foot?

Metal roofing material costs range from $1.50 to $10 per square foot depending on panel type. Standing seam is the most expensive at $4–$10/sq ft for materials alone, while corrugated starts around $1.50/sq ft. Fully installed (including labor, underlayment, and trim), expect $3–$14/sq ft. A typical 1,500 sq ft roof costs $4,500–$21,000 installed.

How long does a metal roof last?

Metal roofs typically last 40–70 years. Galvanized steel panels are rated for 40–60 years, Galvalume steel for 50–60 years, and aluminum or copper roofs often exceed 70 years. Compare this to asphalt shingles that typically last 15–30 years — metal's longevity makes it a strong long-term investment despite the higher initial cost.

Is metal roofing worth it?

For most homeowners, yes. Metal roofing offers several advantages: it lasts 2–3 times longer than asphalt, can reduce cooling costs by 10–25% through solar reflectance, is resistant to fire, wind (up to 140 mph for most panels), and impact, and typically increases resale value. While upfront costs are higher, the total cost of ownership over 50 years is often lower because you avoid one or two shingle replacements. Metal is especially worth it in areas with heavy snow, hail, or wildfire risk.

For related projects, try our Roofing Calculator, Shingle Calculator, or Flat Roof Calculator.