Construction calculators

Type the size the way you'd say it on site. Every calculator draws the job, tells you how much you need, and shows the math.

Concrete

• Concrete slab / padCubic yards and 80 lb bags. Rectangle, L-shape, circle or square footage.
• Concrete on metal deckComposite, form and dovetail floor deck from Vulcraft and Canam, or type your own flute sizes. Cubic yards and bags.
• Raised slabRib walls, insulation pockets and the slab on top: concrete CY, insulation CF and sheets, rib dowels. Flat or ramp.
• Concrete curbCurb & gutter, mountable, straight and sloped-top curbs: concrete CY and weight, drilled epoxy dowels, rebar with laps and stock bars to buy.
• Columns, post holes, footings & stepsSonotubes, fence posts, piers and steps — CY and bags.

Rebar & steel

• Rebar for a slabBar count, laps, total length, weight and 20' bars to buy. Rectangle or trapezoid, #3–#11, one or two mats.
• Epoxy anchorsCartridges of anchoring epoxy for threaded rod or rebar dowels.
• Steel weightPlate, rebar, pipe, tube and angle — lb/ft and total.

Gravel, sand and dirt

• Asphalt tonsHot-mix tons for a driveway or lot.
• PaversPavers, base and bedding sand for patios and drives.
• Retaining wallBlocks, caps, base and drain rock for a block wall.
• SodPallets, slabs or rolls of sod for a lawn, plus topsoil in CY.
• Cubic yards — gravel, stone, sand, dirtCY and tons for gravel, crushed stone and sand (loose or compacted); CY for topsoil, fill and mulch.

Masonry

• BrickBrick count and mortar for any brick size and bond pattern — with every bond pattern drawn and explained.
• Thin brickFlats, corners, panels and screws, adhesive, pointing mortar and brick wash from the wall SF.
• CMU block wallBlock count, mortar bags, grout for filled cells and bond beams — 4" to 12" block.
• CMU wall rebarVertical bars, bond-beam bars, dowels, laps and 20' stock bars for a block wall.
• Joint reinforcement (truss / ladder)Rows, 10' pieces with laps, and prefab corners and tees for CMU bed joints.
• MortarBags of mortar for block or brick, by count or wall SF — plus site-mix cement, lime and sand.
• Grout (CMU)Grout for block cells and bond beams — ft³, CY and 80 lb bags.
• Wall anchors & brick tiesAnchors per SF and total from the wall SF and the spacing — brick, stone cladding and more.

Measuring

• Slope, grade & ADA rampPercent, degrees, ratio, pitch — and ramp layout.
• Fraction ↔ decimal ↔ mmNearest tape fraction, exact decimal and mm, with a chart.
• Square footageAdd up rooms and pieces — rectangles, triangles, circles — and take away what doesn't count. SF and SY.
• Feet-inch calculatorAdd, subtract, multiply and divide lengths like 12' 6-1/2", to the nearest 1/16".
• Unit converterFeet, inches, meters, SF, acres, CY, gallons, pounds, tons — exact conversions.

Framing

• Wall framingStuds, plates and sheathing sheets for a wall — 12", 16", 19.2" or 24" OC, with openings, corners and tees.
• Plywood & OSB sheathingSheets for a floor, wall or roof — 4×8, 4×9 or 4×10, with roof pitch and nails per sheet.
• StairsRisers, treads, total run and stringer length from the floor-to-floor height, checked against IRC limits.
• Roof pitch & raftersPitch, angle, percent and rafter length.
• Board feetLumber list to board feet, linear feet and cost.
• Deck boardsBoards, joists and screws for a wood or composite deck.
• FencePosts, rails, pickets and post concrete.

Roofing & exterior

• RoofingSquares and shingle bundles for gable or hip roofs.
• SidingLap siding squares and pieces, or board and batten — with trim.
• StuccoBase and finish bags, lath, WRB, trim and control joints — 3-coat, 2-coat on block, or one-coat.
• Stone veneerFlats SF, corner LF, WRB, lath, scratch coat and setting mortar for adhered stone.
• EIFSWRB, adhesive, EPS board, base coat, mesh, primer and finish from wall SF — Sto and Dryvit.

Interior finishes

• DrywallSheets, screws, tape and mud for a room.
• Firestop sealant & sprayTubes, sausages or pails of sealant for joints and pipe holes, or gallons of spray for head-of-wall joints.
• InsulationBags of blown-in or batt insulation from the bag coverage chart, with attic R-values by climate zone.
• PaintGallons for walls and ceilings from your can's coverage.
• Liquid waterproofing & air barrierGallons and pails from the mil thickness — roller or spray, on sheathing, concrete or CMU.
• TileTiles, boxes and grout bags for a floor or wall.
• Flooring & carpetBoxes of plank flooring, or carpet off the roll with seams.
• Baseboard & trimLinear feet and 8', 12' or 16' pieces of baseboard, shoe or crown, less the doors.

Electrical & plumbing

• Voltage dropVolts lost in a wire run, and the smallest size for 3% or 5%.
• Pipe volumeGallons of water in PVC, copper and PEX runs — and what it weighs.

Free, no login. Every number is worked out and shown, with its source.