About roofmath.dev

Our Mission

We believe everyone deserves access to accurate roofing measurements and cost estimates. Whether you're a homeowner planning a roof replacement, a contractor preparing a bid, or a roofer double-checking calculations on the job site, our tools are here to help.

How It Works

All calculations run directly in your browser. We don't send your data to any server and we don't store any information. Enter your values, get instant results, and print them to share with your contractor or crew.

Important Disclaimer

Our calculators provide estimates based on industry standards and general guidelines. They are not a substitute for a professional roof inspection or on-site measurement. Always consult a licensed roofing professional before purchasing materials or beginning work. Local building codes may have additional requirements.

Our Calculators

• Roof Area Calculator — Calculate total roof area from building dimensions and pitch
• Shingle Calculator — Calculate how many shingle bundles you need for your roof
• Roof Pitch Calculator — Find your roof pitch from rise/run measurements
• Metal Roofing Calculator — Calculate metal roofing panels, ridge caps, and screws needed
• Roofing Material Cost Estimator — Estimate total roofing project costs including materials, labor, and tear-off
• Underlayment Calculator — Calculate how many rolls of roofing underlayment you need
• Gutter Length Calculator — Calculate total gutter length, downspouts, end caps, corners, and hangers needed for your home with cost estimates
• Roof Ventilation Calculator — Calculate required attic ventilation per building code
• Ice & Water Shield Calculator — Calculate ice and water shield membrane needed for eaves, valleys, and penetrations
• Rafter Length Calculator — Calculate rafter length from span and pitch

Resources

Check out our Roofing Glossary to learn common terms, our Roof Pitch Guide for everything about slopes, and our Materials Comparison Guide to compare roofing options.