Exterior Home Improvement Calculators

Estimate materials and costs for roofing, siding, fences, decks, concrete, gutters, and other exterior home improvement projects.

Build It Right the First Time

Exterior projects are unforgiving. Roofs, siding, fences, decks, concrete slabs, gutters, and sheds all have to stand up to weather, structural loads, and local building codes — and they all require the right amount of material to begin with. Underestimate by a few bundles of shingles or a couple of bags of concrete and your project stalls; overbuy and you're paying for material that sits in the driveway. The roofing calculator, fence calculator, decking calculator, concrete calculator, siding calculator, and gutter calculator on this page each take your real measurements and turn them into accurate quantities so you can order once and build once. Even smaller jobs like a shed calculator or stain calculator save you from guessing at coverage and going back for more.

Common Exterior Project Considerations

Weather exposure — Materials sized for sun, rain, snow, and freeze/thaw cycles need realistic waste factors and proper coverage.
Structural codes — Decks, pergolas, and retaining walls have load and span requirements that affect joist count, post depth, and footing volume.
Material expansion — Composite decking, vinyl siding, and concrete all move with temperature; gaps and tolerances change quantities.
Drainage — Gutters, downspouts, and grading have to direct water away from foundations, which factors into linear feet and accessory counts.
Foundation requirements — Posts, piers, and slabs all need correct concrete volume below grade as well as above.

Browse Exterior Calculators by Project Type

Pick a calculator below and get a buy-list in under a minute. Each calculator includes the waste factor and overage typical for its material so the number you see is the number you order.

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