Roofing Calculator
Calculate roofing materials including shingles, underlayment, ridge caps, starter strips, and nails. Handles simple gable, hip, or complex roof structures.
Professional Roofing Materials Calculator
Industry-standard calculations based on IRC, IBC, and manufacturer specifications
1Roof Dimensions
2Material Specifications
3Ventilation (Required)
Required for IRC ventilation compliance. Typically equals footprint (length × width).
4Ridge Details
All roofs have a ridge. For simple gable roofs, typically equals roof length.
Ready to Calculate
Enter your roof specifications and click "Calculate Materials" to see results
Based on NRCA standards, IRC/IBC codes, and manufacturer specifications from GAF, CertainTeed, Owens Corning, and IKO
Want to Learn More?
NRCA guidelines, pitch multipliers, shingle bundle coverage, underlayment specs, and IRC/IBC ventilation requirements.
Read the Roofing Squares GuideHow to Use This Calculator
- Select roof type: Choose simple gable, hip, or complex.
- Enter roof measurements: Input length, width, and roof pitch.
- Choose shingle type: Select 3-tab, architectural, or designer.
- Review materials: See squares, bundles, and accessories needed.
Roofing Measurement Standards
One "square" equals 100 sq ft. A bundle typically covers 33 sq ft (3 bundles per square). Add 10-15% waste for cuts and ridge caps.