🏠 Free Roofing Calculator

Roof Shingle Calculator

Enter your roof dimensions and pitch to get the exact number of shingle bundles needed.

🏠 Roof Shingle Calculator

📊 Roofing Materials Needed

Understanding Roofing Squares

Roofing is measured in squares — one square equals 100 square feet. Most shingle bundles cover about 33 sq ft, so you need 3 bundles per square. Always add 10–15% for waste, hips, ridges, and valleys.

  • Starter strip shingles: 1 bundle per 100 linear feet of eaves.
  • Ridge cap: typically 1 bundle per 35 linear feet of ridge.
  • Underlayment rolls: 1 roll covers approximately 400 sq ft.