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Roofing Calculators — Free Cost & Material Estimators

Estimate roofing costs, materials, and labor for your home. Our roofing calculators help you budget for roof replacement, repairs, gutter installation, and more — whether you're hiring a contractor or going DIY.

Gutter Slope Calculator

Calculate the correct gutter slope for your home. Find the exact drop in inches for any run length with standard slope rates and downspout placement guidance.

Related Categories

Insulation Calculators General Calculators

Frequently Asked Questions

How much does a new roof cost on average? +

The average cost of a new roof in the US ranges from $5,000 to $30,000+, depending on roof size, material (asphalt shingles, metal, tile), and your location. Most homeowners pay between $8,000 and $15,000 for a standard asphalt shingle roof.

How do I know if my roof needs replacing? +

Common signs include missing or curling shingles, leaks or water stains on ceilings, sagging roof deck, and shingles that are 20+ years old. A professional inspection can confirm whether repair or full replacement is needed.