Roofing Calculator

Our roofing calculator helps you determine the amount of materials needed for your roofing project. Whether you’re working with asphalt shingles, metal roofing, tiles, or slate, this calculator provides accurate estimates for all your roofing needs.

How to Use

Select Your Roof Style
- Choose between Gable, Hip, Flat, Mansard, or Gambrel roof styles
- Each style may require different calculations for valleys and hips
Choose Roofing Material
- Asphalt Shingles: Most common, includes 15% waste factor
- Metal Roofing: Includes 10% waste factor
- Tile: Includes 20% waste factor for breakage
- Slate: Includes 15% waste factor
Select Measurement Unit
- Choose between feet or meters based on your preference
- All measurements will be calculated in your chosen unit
Enter Roof Sections
- Divide your roof into sections for accurate calculations
- For each section, provide:
  - Length and width measurements
  - Roof pitch (slope)
  - Valley and hip lengths (if applicable)
- Add multiple sections for complex roof designs
Understanding Results
- Total squares needed (1 square = 100 square feet)
- Detailed materials list including:
  - Main roofing material
  - Underlayment rolls
  - Nails/fasteners
  - Starter strips
  - Ridge caps
  - Valley and hip materials
- Section-by-section breakdown
- Waste factor included in calculations

Tips for Accurate Measurements

Measure from the ground to ensure safety
Include overhangs in your measurements
Double-check all measurements before calculating
Consider adding extra material for repairs
Account for all roof features (chimneys, skylights, etc.)

Safety Note

Always consult with a professional roofer for final measurements and material quantities. This calculator provides estimates only and should not be used as the sole basis for purchasing materials.