Buildy Buddy

Calculation tools for contractors & DIY builders
Tools
iUse when buying baseboard, chair rail, casing, or any linear moulding. Enter your cut list and stock length to see exactly how many pieces to buy with an optimized cut plan that minimizes waste and saves money on every trip to the store.

Moulding Cut Optimizer

Calculate exactly how many pieces to buy and see an optimized cut plan that minimizes waste.

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iEssential before purchasing hardwood, laminate, or any flooring sold by the box. Enter room dimensions to get total square footage with a waste factor applied, then see the exact number of boxes to buy so you never over-order or come up short.

Flooring Calculator

Compute square footage, waste factor, and total boxes needed for any room layout.

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iPlan your plywood, MDF, or melamine cuts before heading to the shop. Enter a cut list and the optimizer arranges parts onto the fewest sheets possible with visual cut diagrams you can follow at the saw.

Sheet Goods Cut Optimizer

Optimize rectangular cuts from plywood, MDF, or other sheet goods to minimize waste.

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iRequired for click-lock plank flooring installations where manufacturers specify a minimum stagger distance between end joints. Generates a random row-by-row layout that meets spec and avoids repeating step patterns.

LVP Row Calculator

Generate a random stagger layout for luxury vinyl plank with manufacturer-spec compliance.

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iDetermine the right number of steps, riser height, and tread depth for any total rise. Validates against IRC residential code limits and shows a side-profile stringer diagram you can use as a reference during framing.

Stair Calculator

Calculate rise, run, and number of treads for code-compliant stairs with SVG profile.

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iFigure out how many gallons to buy for walls and ceilings. Enter room dimensions and door or window counts, choose single or multiple coats, and get a precise gallon count that avoids waste and ensures color-batch consistency.

Paint Calculator

Estimate gallons of paint needed for walls and ceilings with door/window deductions.

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iCalculate cubic yards for slabs, footings, and cylindrical piers. Also estimates pre-mixed bag counts for smaller pours so you know exactly what to order from the batch plant or hardware store.

Concrete Calculator

Calculate cubic yards, bags, and cost for rectangular slabs and cylindrical piers.

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iPrevent ugly sliver cuts at the walls by planning your tile layout before setting any tile. Shows border cut sizes for both centered and corner-start patterns with grout spacing factored in, plus a visual preview.

Tile Layout Calculator

Plan centered or corner-start tile layouts with grout lines, border cuts, and waste.

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iGet the exact board count for your deck width and see whether the last board needs a rip cut. Can also suggest an adjusted gap width that makes all boards fit evenly for a cleaner finished look.

Deck Board Calculator

Calculate board count, gap spacing, and balanced layout for deck surfaces.

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iEliminates trial-and-error when cutting crown moulding flat on a miter saw. Enter the spring angle and corner angle to get exact compound miter and bevel settings without wasting expensive stock.

Crown Moulding Angles

Calculate compound miter and bevel angles for cutting crown moulding flat on the saw.

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iGet a complete material list for your drywall job — sheets, tape, screws, and joint compound — so nothing gets forgotten when ordering. Handles both wall and ceiling calculations in one place.

Drywall Estimator

Estimate sheets, joint compound, tape, and screws for walls and ceilings.

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iComputes board footage for hardwood and rough-sawn lumber that is priced by the board foot rather than linear foot. Enter thickness, width, and length for each board plus a per-BF price for cost totals.

Board Foot Calculator

Calculate board feet for hardwood and rough-sawn lumber purchases with cost estimate.

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iCount total studs including extras for corners, headers, jack studs, king studs, and cripples that are easy to overlook. Supports 16" and 24" on-center spacing with door and window openings.

Framing Stud Calculator

Estimate studs, plates, and headers for wall framing with openings.

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iEnter any two known values — rise, run, percentage, or angle — and get all the others instantly. Includes compliance checks against ADA ramp maximums, foundation drainage grades, and plumbing pipe slope standards.

Slope & Grade Calculator

Calculate slope, grade, angle, and ratio with ADA and drainage compliance checks.

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iInstantly convert between feet, meters, square feet, square yards, cubic yards, cubic feet, and dozens of other construction units across length, area, volume, and weight categories.

Unit Converter

Convert length, area, volume, and weight units common in construction.

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