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Calculate roofing materials, shingles, underlayment, ridge cap, labor costs, and total project expenses for any roof type with accurate pitch calculations and weather considerations.
Basic roof dimensions and type
Building length
Building width
Pitch: 6:12
A roofing square equals 100 square feet. This is the standard unit used in the roofing industry for estimating materials and costs.
Pitch is expressed as rise over run (e.g., 6:12 means 6 inches of rise for every 12 inches of horizontal run). Common pitches range from 4:12 to 12:12.
Typically, 3 bundles of shingles cover one roofing square. Each bundle weighs 60-80 pounds.
Felt or synthetic underlayment provides a water-resistant barrier. One roll typically covers 400 square feet (4 squares).
Required in cold climates, installed at eaves and valleys. Typically 2-3 rows from the eave edge.
Proper ventilation extends roof life. Standard ratio is 1 square foot of ventilation per 150 square feet of attic space.
Calculate for gable, hip, flat, gambrel, mansard, shed, butterfly, and dome roofs with accurate formulas.
Get shingles, underlayment, ridge cap, starter strips, nails, and ventilation requirements.
Calculate materials, labor, and disposal costs with customizable pricing for accurate budgeting.
Automatic pitch angle conversion and slope multiplier calculation for accurate area estimation.
Customizable wastage percentage (10-20%) for cuts, overlaps, and installation errors.
Factor in wind speed, snow load, and climate zone for proper material selection.
A roofing square is the standard unit of measurement in the roofing industry, equal to 100 square feet of roof area. For example, if your roof measures 2,400 square feet, that equals 24 roofing squares. Roofing materials like shingles, underlayment, and labor are typically priced per square, making this the industry standard for estimates and ordering.
Common Roof Pitches:
The pitch multiplier is used to convert flat roof area to actual sloped roof area. Our calculator handles this automatically.
Essential Materials:
| Material | Lifespan | Cost/Square |
|---|---|---|
| Asphalt Shingles | 15-30 years | $90-$150 |
| Metal Roofing | 40-70 years | $200-$400 |
| Clay/Concrete Tile | 50-100 years | $300-$600 |
| Slate | 75-200 years | $600-$1000 |
| Wood Shakes | 20-40 years | $250-$450 |
| Rubber/EPDM | 30-50 years | $150-$300 |
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