Construction Calculators

Free professional-grade tools for contractors, carpenters & DIY builders. Each calculator includes detailed how-to guides, material estimates & code references.

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Square Footage Calculator

Calculate area for any shape, rectangle, L-shape, circle & triangle. Convert to sq yards, meters & acres.

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Concrete Cost Calculator

Estimate concrete costs by area & thickness. Material, labor & total with finish options.

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Asphalt Driveway Calculator

Calculate asphalt tons, thickness & paving costs for any driveway project.

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Concrete Slab Calculator

Estimate concrete volume, bags & cost for slabs, footings & patios.

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Board Foot Calculator

Calculate board feet from lumber dimensions, supports multiple pieces & price estimates.

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Drywall Calculator

Estimate drywall sheets, joint compound & tape for any room with waste factor.

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Roofing Calculator

Calculate roofing squares, bundles & cost by roof pitch with pitch factor adjustment.

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Roof Pitch Calculator

Convert roof pitch to angle, slope & pitch multiplier. Find rafter length and roof surface area.

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Rafter Length Calculator

Find rafter length from run & pitch, add the eave overhang, count rafters & estimate lumber board feet.

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Roof Truss Calculator

Count roof trusses by span, pitch & spacing. Find center height, top chord length, lumber volume & delivered cost.

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Deck Stair Calculator

Calculate rise, run & number of steps, built to IRC code standards.

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General Stair Calculator

Size interior stairs, riser height, treads, stringer length, floor opening for headroom & material cost.

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Flooring Calculator

Estimate flooring materials for hardwood, tile, carpet & laminate with cost breakdown.

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Tile Calculator

Calculate tiles needed for floor & wall, 12x24, subway, hex and custom sizes with waste factor.

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Grout Calculator

Estimate grout by tile size, joint width & depth. Coverage charts for all common sizes.

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Thinset Calculator

Estimate thinset mortar bags by trowel notch size & tile area. TCNA coverage rates for every notch.

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Carpet Calculator

Estimate carpet by room size, roll width & waste factor. Nylon, polyester, wool & triexta compared.

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Subfloor Calculator

Estimate 4ร—8 subfloor sheets by room size & joist spacing. OSB vs plywood compared with APA ratings.

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Epoxy Floor Calculator

Estimate epoxy gallons by floor size & coating type. Water-based, solvent-based & 100% solids compared.

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Deck Stain Calculator

Estimate stain gallons by deck size, stain type & wood condition. Transparent to solid, oil vs water-based covered.

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Brick Calculator

Calculate bricks and mortar for walls, standard, queen & king sizes. Single or double wythe.

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Paint Calculator

Calculate paint needed by room dimensions, coats & coverage. Includes primer estimates.

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Wallpaper Calculator

Estimate wallpaper rolls by room size & pattern repeat. Straight vs drop match waste explained.

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Siding Calculator

Calculate siding squares & cost for vinyl, fiber cement, wood & metal siding.

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Rebar Calculator

Calculate rebar spacing, quantity & total weight for slabs, footings & walls.

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Decking Calculator

Calculate deck boards, joists, railing balusters & screws for any size deck project.

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Framing Calculator

Calculate wall studs, plates, headers & cripples, 16" or 24" OC spacing.

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Floor Joist & Beam Span Calculator

Check floor joist spans by size, spacing & species. Count joists, estimate board feet & size a support beam.

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Gutter Calculator

Calculate gutters, downspouts, hangers & accessories for roof drainage systems.

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Concrete Block Calculator

Calculate CMU blocks, mortar & cost for any wall. Standard 8" & 12" block sizes with waste factor.

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Countertop Calculator

Measure straight, L-shape & U-shape counters. Square footage, backsplash, edge length & installed cost.

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Construction Estimating Made Simple

Whether you're framing a house, pouring a patio, or hanging drywall, accurate material estimates save time and money. Our construction calculators cover the most common trade calculations, from board feet for lumber orders to concrete volume for slabs and footings. Each tool is paired with a comprehensive guide explaining the math, the building code requirements, and the practical tips that pros use on the job site.

Use these calculators for: material takeoffs, cost estimates, bid preparation, or DIY project planning. No sign-up, no fees, instant results updated as you type.