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Metal Roofing Calculator

Roofing Material Calculator

How to Calculate Metal Roofing Panels

Panels needed = (Roof Length * Roof Width * Roof Pitch Multiplier) / (Panel Length * Panel Width)

Types of Roof Shingles with Advantages and Disadvantages

Type of Shingle Advantages Disadvantages
Asphalt Shingles
  • Fire and water resistant
  • Flexible enough to handle heavy snowfall
  • Relatively inexpensive
  • Available in various shapes and colors
  • Short lifespan
  • Susceptible to temperature changes
Wood Shingles
  • Aesthetic value
  • More environmentally friendly
  • Easily cleaned with a pressure washer
  • Susceptible to fire
  • Vulnerable to termite damage
  • Do not handle extreme weather conditions well
  • Replacing damaged shingles is difficult
Metal Shingles
  • Lightweight
  • More durable than asphalt and wood shingles
  • Sun-reflective properties
  • More expensive
  • Very noisy during rain or hail
  • Some metals are susceptible to denting
Clay or Concrete Tiles
  • Aesthetic value
  • Non-flammable
  • Fade-resistant
  • Can last over 50 years
  • Relatively expensive
  • Very heavy, requiring additional framing

Roof Pitch Area Multipliers

Common roof pitch multipliers can be used to calculate the total roof area.

Roof Pitch (in/12) Multiplier
0/12 1
1/12 1.0035
2/12 1.0138
3/12 1.0308
4/12 1.0541
5/12 1.0833
6/12 1.118
7/12 1.1577
8/12 1.2019
9/12 1.25
10/12 1.3017
11/12 1.3566
12/12 1.4142
13/12 1.4743
14/12 1.5366
15/12 1.6008
16/12 1.6667
17/12 1.7341
18/12 1.8028
19/12 1.8727
20/12 1.9437
21/12 2.0156
22/12 2.0883
23/12 2.1619
24/12 2.2361
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