Roofing & Structure Calculators

Accurate material counts for roofing, wall framing, insulation, and exterior cladding. From measuring roof pitch to counting shingles, calculating gutter runs, and estimating insulation rolls for walls and ceilings.

Common Tasks

Replace or Install a Roof

Install Gutters and Downspouts

Frame and Clad Exterior Walls

All Roofing & Structure Calculators

Roof Area Calculator

roofing

Calculate true roof surface area from footprint dimensions, accounting for roof pitch, overhangs, and common roof shapes.

Shingles Calculator

roofing

Convert roof area into shingle bundles, squares, and ridge cap quantities for accurate roofing material orders.

Gutter & Downspout Calculator

roofing

Calculate gutter sections, downspouts, elbows, and end caps from roof perimeter, corners, and building height.

Roof Underlayment Calculator

roofing

Calculate rolls of synthetic underlayment or roofing felt needed from roof area with overlap factor applied.

Ridge Cap Calculator

roofing

Calculate ridge cap and hip cap shingle pieces and bundles from ridge and hip lengths.

Siding Calculator

exterior

Calculate siding squares, boards, or board-feet needed from wall area with window and door deductions.

Stud Wall Framing Calculator

framing

Get a full material list for wall framing — studs, top plates, bottom plates, and blocking — based on wall length and stud spacing.

Insulation Calculator

insulation

Estimate insulation rolls or batts needed for walls, ceilings, and floors, with R-value layering and stud-spacing adjustments.

In-Depth Guide

Learn the concepts behind these calculators with worked examples and reference tables.

Roofing & Structure Guide →