🏠 Roof Materials & Area Calculators

Roof area calculators, shingle and metal panel estimators, pitch converters, underlayment sizing, and ventilation tools.

Calculate your total roof area from the building footprint and roof pitch, accounting for overhangs and complexity.

Calculate how many bundles and squares of shingles you need for your roof, including waste factor.

Calculate the number of metal roofing panels needed based on your roof dimensions and panel width.

Estimate the number of clay or concrete roof tiles needed for your project, including hip and ridge tiles.

Convert between roof pitch (rise/run), degrees, and percentage. Find the pitch factor for area calculations.

Calculate rolls of roofing underlayment (felt or synthetic) needed for your roof area, including overlap allowance.

Calculate ridge cap shingles or metal trim needed for all ridges and hips on your roof.

Calculate the Net Free Area (NFA) of roof ventilation needed for proper attic airflow based on attic floor area.