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All Calculators
Grouped by trade. Each calculator uses industry-standard formulas and includes waste factors.
Remodel Planning
7 calculatorsAttic Conversion Calculator
Live cost ranges for bonus-room → habitable → full ADU attic conversions. Permanent stair, joist sister, small / full-width shed dormer, egress dormer, mini-split, and spray-foam adders. IRC R301.5 / R305.1 / R310 / R806.5 callouts inline.
Basement Remodel Calculator
Live cost ranges + materials list for finishing a basement — pick scope, size, finish, region; toggle bath, egress window, sewage ejector, wet bar. IRC R310 / R317.1 / R305.1 callouts inline.
Bathroom Remodel Calculator
One materials list across drywall, paint, flooring, and wall tile — surface overlaps handled automatically. A great starting point for a full bathroom remodel.
Garage Conversion Calculator
Live cost ranges for bonus-room → habitable → full ADU garage conversions. Garage-door infill, mini-split, slab leveling, egress, foundation, and service-upgrade adders. IRC R302.6 / R310 / NEC 220.83 callouts inline.
Home Addition Cost Calculator
Live low–likely–high cost ranges for ground-floor, second-story, sunroom, ADU, and bump-out additions. Pick type, foundation, finish, HVAC, region; toggle bath/kitchen/panel. Itemized soft costs (design, permits, contingency) with all-in total.
Kitchen Remodel Calculator
One materials list across drywall, paint, flooring, and backsplash tile — backsplash vs paint overlap handled automatically. A great starting point for a full kitchen remodel.
Laundry Room Remodel Calculator
Live cost ranges + plumbing & electrical adders — pick typology, finish, floor level; toggle new rough-in, dryer circuit, drain pan, smart leak detection. IRC P2706 / NEC 210.8 / IRC M1502 callouts inline.
HVAC & Ventilation
13 calculatorsAC Size Calculator
What size air conditioner do you need? The cooling load and the right tonnage under ACCA Manual S — from your home's size, climate, insulation, and windows by direction — with the load shown next to the "500 sq ft/ton" rule so you can see why oversizing makes a house clammy. Screening estimate.
Bathroom Exhaust Fan Calculator
What size bathroom exhaust fan? CFM from room size — the code minimum (IRC / ASHRAE 62.2) next to the HVI best-practice size, plus the rated-vs-delivered fix so it actually clears steam. Vent, duct, and fixture methods.
Ceiling Fan Size Calculator
What size ceiling fan for your room? The right blade span from the room area (ENERGY STAR), the mount type, and the downrod length from your ceiling height so the blades land where you feel them. Flags rooms that want two fans.
Dehumidifier Size Calculator
What size dehumidifier do you need? Pints/day from your room size and dampness, shown on BOTH the current DOE label and the old pre-2019 chart — because the 2019 rating change makes old charts buy you one too small. Basement and crawlspace adjustments.
Duct Size Calculator
What size duct for your airflow? The equal-friction method (the Manual D ductulator math) turns a run's CFM and friction rate into a round diameter, rectangular equivalents, and velocity — with noise checks, flex vs metal, and return-grille sizing. Screening estimate.
Furnace Size Calculator
What size furnace do you need? The heating load and the furnace BTU input/output (or kW for electric) from your home's size, climate, and insulation — plus the input-vs-output AFUE gotcha and why the "50 BTU/sq ft" rule oversizes. Screening estimate.
HVAC BTU / Manual J Calculator
Cooling + heating BTU, AC tonnage, furnace size at AFUE, heat-pump balance point + supplemental kW, blower CFM, ASHRAE 62.2 ventilation. Per ACCA Manual J / Manual S 2023, ASHRAE 1%/99%, DOE 2023.
Manual J Calculator
How many BTUs and tons does your house need? A Manual-J-lite heating and cooling load from your size, climate, insulation, and windows — with the right-sized equipment shown next to the "500 sq ft/ton" rule of thumb so you can see how badly rules oversize. Screening estimate.
Mini Split Breaker Calculator
Breaker and wire for mini-splits and central AC from the nameplate MCA and MOP — and why the breaker can legally exceed the wire (Art. 440).
Mini-Split Sizing Calculator
What size mini-split do you need? Per-zone cooling and heating loads → a recommended ductless head size, with the cold-climate capacity derate and oversizing/short-cycling checks that BTU/sq-ft rules miss. Flags when a hyper-heat model or backup heat is needed. Screening estimate.
Range Hood CFM Calculator
How many CFM for a range hood? Size by cooktop width or gas BTU, check it against the code minimum, and find out if you cross the 400 CFM line that requires makeup air per IRC M1503.4. Island and downdraft adjustments.
Return Air Grille Size Calculator
What size return air grille or supply register? Turn your airflow (CFM) into the grille size by face velocity, with the standard sizes that fit and the velocity each produces. Filter grilles, plain returns, supply registers. Undersized returns are the #1 duct problem.
Whole-House Ventilation Calculator
How much fresh air does your house need? Continuous CFM by ASHRAE 62.2-2019 shown next to the IRC number (they differ), with intermittent fan capacity and the optional blower-door infiltration credit done the correct 2019 way.
Masonry, Stucco & Hardscape
11 calculatorsAsphalt Driveway Calculator
Hot mix asphalt tons, aggregate base, tack coat, geotextile, demo disposal & sealcoat for new install, overlay, mill-and-overlay, or tear-out. NAPA / Asphalt Institute MS-22 specs with climate & soil adjusters and recommended PG binder grade.
Brick Calculator
Bricks, mortar bags, ties, weep holes, paver base & polymeric sand, and firebox firebrick — across veneer, multi-wythe, thin brick, pavers, and firebox. BIA TN 10 / IRC R703.8 / ICPI Tech Spec 2.
Cinder Block / CMU Calculator
Blocks, mortar bags, grout / core fill, bond-beam and lintel units, joint reinforcement, and prescriptive rebar for a concrete masonry wall — with a hard-stop engineer gate. ASTM C90 / NCMA TEK 04-02A.
Driveway Sealer Calculator
Asphalt sealcoat two ways — ready-to-use pails (Homeowner) or concentrate plus water, silica sand & additive (Contractor) — with crack filler, oil-spot primer, and a coal-tar ban check by state. Anchored to manufacturer TDS at 0.11–0.13 gal/sy per coat; quantities only.
Fire Pit Calculator
How many blocks for a DIY fire pit ring? Block count, gravel base, optional firebrick liner, and a fire-clearance advisory — standard block or a manufacturer kit.
Paver & Patio Calculator
Pavers, base aggregate, bedding sand, polymeric sand, edge restraint & sealer for sand-set, mortar-set, pedestal & PICP installs. Concrete, brick, bluestone, travertine, granite, porcelain. ICPI Tech Spec 2/3/18.
Paver Base Calculator
How much gravel base and bedding sand for a paver patio or driveway? Base depth, compaction, and bedding by application — before you pick a paver. ICPI Tech Spec 2.
Polymeric Sand Calculator
Bags of polymeric sand for paver and flagstone joints by joint width and brand (Techniseal, Gator, SEK, Quikrete), plus the ASTM C33 bedding sand underneath.
Sand Calculator
Cubic yards, tons, and 50-lb bag count for ASTM C33 concrete sand, C144 mason sand, play sand, fill sand, and manufactured M-sand — with compaction, wet-weight, and regional naming (torpedo / sharp / bank sand) built in.
Stone Veneer Calculator
Flats and corners, mortar, lath, WRB, and weep screed for adhered manufactured or thin natural stone — with the corner-to-flat conversion done right. ASTM C1670 / C1780 / IRC R703.12.
Stucco Calculator
3-coat / 2-coat / 1-coat portland cement stucco take-off — bags per coat, metal lath, weep screed, casing bead, control joints, Grade D paper. Per 2021 IRC R703.7 + ASTM C926 / C1063.
Electrical
11 calculatorsBreaker Size Calculator
What size breaker for your load — minimum standard rating per NEC 240.6(A) with the 125% continuous rule and the wire it must pair with.
Electrical Load Calculator
What size electrical service you need — a real NEC Article 220 dwelling load calc (Standard or Optional method) for minimum service amps and wire size.
EV Charger Circuit Calculator
Breaker and wire for any EVSE rating per NEC Article 625 — 125% rule, hardwire vs plug, GFCI, and long-run voltage drop.
Garage Subpanel Calculator
The 4-wire feeder to a detached garage or shed — wire by amps and distance, ground rods, disconnect, and burial depths.
Generator Size Calculator
What size generator for your backed-up loads — running watts plus the largest motor-starting surge, with proper sizing headroom.
Hot Tub Wiring Calculator
The full NEC Article 680 spa circuit — GFCI breaker, wire size with the manufacturer floor, 5-ft disconnect, bonding, and burial depths.
Recessed Lighting Calculator
How many recessed lights and where — fixture count, grid spacing, and wall offsets with a brightness check by room type.
Tankless Water Heater Breaker Calculator
Circuits, breakers, wire, and total amps for electric tankless models — with an honest check of whether your panel can take it.
Voltage Drop Calculator
How much voltage a wire run loses — volts and percent by wire size, load, and one-way distance, with the NEC 3% recommendation check.
Welder Circuit Calculator
Breaker and wire from the nameplate primary amps and duty cycle — the NEC Article 630 math that lets welder wire run smaller than the outlet.
Wire Size Calculator
What gauge wire for your load — minimum AWG per NEC Table 310.16 with derating, appliance presets, and a long-run voltage-drop check.
Flooring
9 calculatorsCarpet Calculator
Broadloom sq yd with roll-width seam plan, pad rolls, tackless strip, and stair runner.
Epoxy Garage Floor Calculator
Coating gallons or DIY kits, decorative flake in pounds, moisture-barrier primer, and anti-slip grit by garage size — built on the 1,604 sq ft/mil coverage identity with a required ASTM moisture-test gate and ICRI 310.2R prep guidance.
Floor Leveling Compound Calculator
How many bags of self-leveling underlayment before finish flooring? Bags and primer by product, depth, and substrate — from manufacturer data sheets, not a blended rate.
Floor Mud Calculator
Calculate mortar bed volume, bags, and cement/sand for shower floors, pre-slope layers, and flat floor beds. Correct center-drain geometry formula.
Flooring Calculator
Estimate flooring materials for tile, hardwood, laminate, and vinyl plank.
Hardwood Flooring Calculator
Cartons of solid or engineered wood — with NWFA waste, fasteners, and trim.
Laminate Flooring Calculator
Boxes of laminate by room — with waste, underlayment, vapor barrier, and trim.
Subfloor Calculator
OSB or plywood Sturd-I-Floor sheets, screws, ring-shank nails, and APA AFG-01 adhesive sized off your joist spacing — per APA E30 and IRC R602.3(1) 6"/12" fastener schedule.
Vinyl Plank / LVP Calculator
Cartons of LVP, SPC, or WPC by room — with waste, underlayment, and trim.
Plumbing
9 calculatorsDrain Slope Calculator
Minimum fall per foot by pipe size — with the IPC/UPC divergence named and a pass/fail against the vertical drop you actually have.
DWV Pipe Size Calculator
Fixture list to branch, building drain, and vent pipe sizes — straight from IPC Table 709.1 & 710.1, with the trap-arm distance check most sizing charts skip.
Septic Tank Size Calculator
Minimum tank capacity by state and bedroom count — straight from state code, with garbage-disposal adders and formula-state rules.
Sump Pump Calculator
Total Dynamic Head from static lift, pipe run, and fittings — the real number to match against a pump curve, not the box’s “max GPM.”
Tankless Water Heater Size Calculator
Peak simultaneous GPM and temperature rise to the flow and BTU/kW you need — with the winter-inlet reality most sizing charts skip.
Water Heater Size Calculator
The DOE first-hour-rating method — count your busiest hour’s hot-water uses and get the FHR to shop for, not a folklore tank size.
Water Softener Calculator
Grain capacity from household size and water hardness — WQA grain math with ppm conversion and the iron correction most sizing charts skip.
Water Supply Pipe Size Calculator
Total water supply fixture units to the minimum main size — with the real IPC-vs-UPC fixture-unit difference and developed-length effect built in.
Well Pressure Tank Calculator
The Boyle’s-Law drawdown math — pump GPM and switch settings to the tank size that stops short-cycling, with the pre-charge check.
Siding & Exterior
9 calculatorsCedar Shake Siding Calculator
Cedar shake & shingle sidewall by weather exposure — bundles, squares, corner allowance, coursing layout & fasteners. Single or double course, per CSSB & IRC R703.5.
Fiber-Cement Panel Calculator
Vertical 4x8/4x9/4x10 fiber-cement (HardiePanel) sheets by column-and-row layout — battens, trim, breakage & fasteners. Per HardiePanel data, ESR-1844 & IRC R703.10.
HardiePlank Calculator
James Hardie HardiePlank takeoff by HardieZone (HZ5/HZ10) — boards, HardieTrim, kickout & butt-joint flashing, fasteners, sealant, HardieWrap.
House Wrap Calculator
How many rolls of house wrap (Tyvek / WRB) you need — accounting for the 6" overlap that cuts coverage — plus seam tape and cap fasteners. Per IRC R703.2 & ASTM E2556.
Lap Siding Calculator
Generic lap siding calculator — LP SmartSide, wood bevel / clapboard, and vinyl. Boards, trim, and fasteners with even coursing adjustment.
Metal Siding Calculator
Metal siding by net coverage — R-panel, corrugated, standing seam & aluminum lap. Cut list, screws or clips, trim, flashing & foam closures. Per IRC R703 & ASTM A792.
Siding Calculator
Estimate siding materials for exterior wall coverage.
T1-11 Siding Calculator
4x8/4x9 T1-11 plywood/OSB panel sheets by shiplap-edge layout — Z-flashing at horizontal joints, trim & siding nails. Great for sheds, per APA 303 & IRC R703.3.
Vinyl Siding Calculator
Vinyl siding by the square — panels, cartons, and the full accessory system (starter, J-channel, corner posts, undersill & trim). Per ASTM D3679 & IRC R703.11.
Framing & Structure
9 calculatorsBeam Span Calculator
What size beam for a basement or crawlspace floor girder? Girder size and ply, post/pier spacing, bearing, and minimum post size, straight from IRC R502.5 and Table R602.7.
Framing Calculator
Size studs, plates, headers, cripples, and fasteners for 2x4 and 2x6 wood-frame walls — straight from 2021 IRC R602.3, R602.7 header spans, R602.7.5 king-stud counts, and R602.3(1) nailing.
Header Size Calculator
What size header for a door or window in a bearing wall? Built-up header size and ply, plus the jack and king studs each end, straight from IRC Table R602.7 and R602.7.5.
Joist Span Calculator
Maximum allowable spans for floor and deck joists by species, grade, size, and spacing — IRC R502.3.1 and R507.6 values with pass/fail checks and the smallest size that carries your span.
Rafter Length Calculator
Common, hip, valley, and jack rafter lengths, plumb and seat cut angles, birdsmouth depth, and a lumber order length from your width, pitch, ridge, and overhang — per IRC R802.
Rafter Span Calculator
The smallest 2×4 to 2×12 rafter for your span, or the longest span a size can carry, by species, grade, spacing, snow load and ceiling — straight from IRC Table R802.4.1.
Roof Sheathing Calculator
Roof deck panel count from sloped area, the minimum span rating for your rafter spacing, H-clip count, and the 2021 IRC nail schedule (now 6 inches in the field).
Stairs Calculator
Code-compliant risers, treads, stringers, handrail, balusters & newels per 2021 IRC R311.7 (R318.7 in 2024 IRC) and AWC DCA 6 stringer span limits. Six configurations: straight, L, U, winder, spiral, curved.
Wall Sheathing Calculator
Count OSB or plywood wall panels, get the code minimum thickness for your wind speed and exposure from IRC Table R602.3(3), and a real nail count from the fastening schedule.
Doors, Windows & Trim
8 calculatorsBaseboard Calculator
How much baseboard? Linear feet, stock pieces, shoe, finish nails, and caulk — from a room, a measured perimeter, or your whole house square footage. WM profiles.
Board & Batten Calculator
Exact, even batten spacing with a batten in every corner across every wall, plus wainscoting box sizes and a full bill of materials — sticks (with stock-length optimization), caulk, adhesive, brads, finish nails, and underlayment or beadboard sheets. Board & batten, Shaker, and picture-frame in one tool.
Egress Window Calculator
Check whether a bedroom or basement window meets IRC R310 emergency-escape code — net clear opening, minimum height and width, and sill height.
Garage Door Calculator
Door weight, torsion spring IPPT, lift cables, hinge / roller / strut count, opener HP, headroom, and wind / HVHZ / CA SB 969 compliance flags. Per DASMA 102/108/115, UL 325, 2021 IRC R309.4 / R602.7, FBC §1620 / §1626.
Interior Doors Calculator
Per-door rough openings, hinge counts, locksets, and specialty hardware (pocket / barn / bifold / bypass / French / Dutch) with IRC code flags. Casing LF feeds the trim calculator.
Shiplap Calculator
Exact board or pack count from the real EXPOSED coverage width — not the nominal or actual board width — across a verified profile catalog (traditional rabbeted pine, UFP-Edge nickel-gap, Woodtone, and more). Horizontal, vertical, and ceiling runs, plus fasteners, adhesive, and caulk.
Trim & Molding Calculator
Estimate crown, casing, chair rail, and shoe — linear feet, stick counts, fasteners, caulk, and crown compound-miter angles. WMMPA WM/LWM profiles.
Window Calculator
Per-opening IRC R310 egress, R308 safety glazing, IECC U-factor compliance by climate zone, flashing materials, and §25C tax-credit status (with OBBBA sunset).
Landscaping
8 calculatorsGrass Seed Calculator
Extension-cited seeding rates by species — new lawn, overseed, or winter overseed of dormant bermuda/zoysia with ryegrass. Pounds, bags, starter fertilizer, and mulch. Penn State / Purdue / Arkansas / UGA / UF Extension cited.
Gravel Calculator
Cubic yards, tons, and bags for driveway gravel, pea gravel, river rock, RCA, and lava rock — with material-specific densities and AASHTO/TxDOT compaction multipliers built in.
Irrigation Zone Calculator
How many sprinkler heads fit on a zone? GPM budget, precipitation rate, cycle-and-soak run time, and a lateral pipe velocity check — from Hunter and Rain Bird design charts.
Landscape Material Calculator
Cubic yards, tons, and bags for gravel, crushed stone, sand, decomposed granite, river rock, lava rock, topsoil, riprap, and landscape boulders. ASTM D448 / AASHTO M43 / NCSA R-class.
Mulch Calculator
Estimate mulch volume and bags needed for landscaping projects.
Sod Calculator
Square feet, slabs, rolls, and pallets for a new lawn — with editable, region-aware pallet coverage (400–700 sq ft) so the pallet count is right, plus optional topsoil and starter-fertilizer quantities. TPI GSS / UFGS sod specs.
Stone Calculator
Tons and cubic yards for crushed stone by grade — #57, #67, #78, #8, #4 ballast, and dense-graded crusher run / ABC / DGA / 21A — with ASTM D448 densities, the compaction factor built in, and every regional alias labeled.
Topsoil Calculator
Project-first depth presets for new lawns, topdressing, garden beds, raised beds, and grade fills — plus a raised-bed blend split (50/50, 40/40/20, Mel's Mix). Cubic yards, tons, and bags. Penn State / UMN / UW Extension cited.
Roofing & Gutters
8 calculatorsGable Area Calculator
Find the square footage of a gable end from width and roof pitch or peak height, plus rake trim length and a waste-adjusted siding quantity.
Gutter Calculator
Estimate aluminum, copper, galvanized, or vinyl gutter materials — LF, downspouts, hangers, elbows, miters, straps & expansion joints. Per SMACNA, IRC R903.4, AAMA 1405.1.
Gutter Size Calculator
What size gutters (5", 6") and how many downspouts you need, sized from your roof drainage area and local rainfall — the SMACNA/IPC hydraulic method.
Metal Roofing Calculator
Panel, fastener, and trim take-off for exposed-fastener and standing-seam metal roofing, built on net coverage width rather than nominal width.
Roof Area Calculator
Turn a building footprint and roof pitch into total roof area, roofing squares, and shingle bundles. Add multiple roof sections at different pitches.
Roof Pitch Calculator
Convert roof pitch between rise:run, degrees, percent grade, and slope multiplier — plus sloped area, rafter length, and code-allowed coverings.
Roofing & Shingle Calculator
Calculate roofing squares, shingle bundles, underlayment, and ridge caps — asphalt, architectural, and 3-tab shingles with pitch-adjusted waste.
Soffit & Fascia Calculator
Soffit panels, fascia boards, and F- & J-channel from your eave run and overhang depth. Vented-intake guidance and fasteners, per manufacturer guides & IRC R806.
Insulation & Climate
8 calculatorsAttic Insulation Calculator
How much insulation your attic needs to hit code R-value — blown-in or batt bag count, the depth to blow to, and the eave vent baffles to keep the soffits clear.
Attic Ventilation Calculator
Net free area, soffit intake and ridge exhaust vent counts, and the 1/150 vs 1/300 IRC R806 ratio — with the exhaust-≤-intake balance rule enforced.
Batt & Fiberglass Insulation Calculator
Bags of fiberglass or mineral-wool batts by wall or attic, with the IECC R-value and faced-vs-unfaced logic.
Blown-In Insulation Calculator
Bags of blown-in fiberglass or cellulose to hit your attic R-value, plus settled depth and the deeper blow-to depth. Uses each product's FTC coverage chart.
Climate Zone Calculator
Find your IECC climate zone by ZIP code or county, with the 2021 IECC insulation R-values and window U-factors required for your zone.
Insulation Calculator
Calculate batts, rolls, rigid foam, and sheets by area and R-value, with an IECC 2021 code check by climate zone.
Rigid Foam Board Insulation Calculator
Sheets of XPS, EPS, or polyiso with board thickness from your target R-value and the code fire barrier.
Spray Foam Calculator
Board-feet take-off, DIY kit count, R-value, vapor retarder class, and IECC / R806.5 / R702.7 compliance flags for open-cell and closed-cell SPF. ASTM C1029 / C518 / E96, ASHRAE 62.2 ventilation.
Decks & Fences
7 calculatorsDeck Beam Span Calculator
How far can a deck beam span? Beam size and ply, post spacing, footing, cantilever, and the post connection from the joist span it carries — per IRC R507.5 / DCA 6.
Deck Calculator
Code-compliant deck framing, decking, footings, ledger fasteners, stairs, and railing — pulled directly from 2021 IRC R507 tables and AWC DCA 6. Trex / TimberTech / AZEK / Fiberon / Deckorators boards.
Deck Footing Calculator
What size footing for a deck post? Footing diameter, thickness, depth to frost, and the concrete and bags per footing from tributary area, snow load, and soil bearing — per IRC R507.3.1.
Deck Joist Calculator
How many deck joists do I need? Joist size, count, cantilever limit, lateral restraint (rim joist or blocking), and a stock-length cut list — per IRC Table R507.6.
Deck Railing Calculator
How many balusters and posts? Posts, balusters at the 4-inch sphere spacing, rails, cap, hold-downs, and stair railing from one length — per IRC R312 and AWC DCA 6. Wood, metal, or cable.
Deck Stain Calculator
Estimate deck stain requirements based on deck size and wood type.
Fence Calculator
Calculate fencing materials including posts, rails, and pickets.
Measuring & Estimating
5 calculatorsBoard Foot Calculator
Build a lumber cut list and get total board feet, MBF, pieces, and linear feet. Nominal sizes (2×4, 1×6) or custom hardwood quarters — the volume unit lumber is priced in.
Cubic Yards Calculator
Turn length, width, and depth — or round footings and triangular beds — into cubic yards, cubic feet, and concrete bags. The volume helper for concrete, gravel, soil, and mulch.
Linear Feet Calculator
Get running feet from a rectangle perimeter, a list of straight runs, or a square-foot area. Subtract openings and see how many sticks to buy — the unit trim, fencing, and gutter are sold in.
Slope Calculator
Convert a slope between percent grade, degrees, inches per foot, and H:1V ratio, and get the total fall to stake over your run — with IRC R401.3, IPC 704.1, and ADA code checks built in.
Square Footage Calculator
Total up rooms, walls, and odd shapes (rectangles, triangles, circles, trapezoids), subtract doors and windows, and convert to sq ft, sq yards, square meters, and squares — the input for every other calculator.
Tile, Grout & Mortar
5 calculatorsBacksplash Tile Calculator
Calculate tiles, grout, thinset, and trim for ceramic, porcelain, glass, marble, and mosaic backsplash projects.
Grout Calculator
How much grout? Bags, boxes, or epoxy units from your tile size, joint width, and area — using the TCNA/ANSI perimeter-to-area coverage formula. Sanded vs unsanded auto-check.
Mortar / Thinset Calculator
Auto-pick the right ANSI mortar class (A118.1/.4/.11/.15/.3 or A136.1 mastic) for substrate and tile size, then get bag count by trowel notch. NTCA / TCNA / ANSI A108.
Thinset Calculator
How much thinset? Bags of thinset mortar from your tile area, tile size, and trowel notch — using manufacturer coverage data and the ANSI 80%/95% mortar-contact rules. Includes a shower-pan deck-mud mode.
Tile Calculator
Floor, wall, or full shower. Tiles, thin-set bags by trowel, grout (TCNA formula), waterproofing membrane, leveling clips, and TCNA EJ171 movement joints.
Drywall
4 calculatorsDrop Ceiling Calculator
Full and border tiles with balanced borders, main beams, 4-ft and 2-ft cross tees, wall molding, and 12-ga hanger wires for a suspended T-bar ceiling — plus a 1:1 light-panel deduction and IRC R305.1 head-height check. ASTM C635/C636.
Drywall Calculator
Calculate drywall sheets needed, disposal weight, and material estimates.
Drywall Mud & Tape Calculator
Get joint compound boxes, tape rolls, and corner bead by GA-214 finish level.
Drywall Screw Calculator
Quickly estimate drywall screw quantities needed for your project.
Cabinets & Countertops
4 calculatorsBathroom Cabinets Calculator
Vanity, sink cutout, plumbing rough-in, linen tower, medicine cabinet, mirror, and install cost. Powder, full, and primary baths. ANSI/KCMA, NKBA, ICC A117.1, IRC 2021.
Cabinet Calculator
General cabinet take-off for any room — cabinets, doors, drawers, hinges, slides, knobs, pulls, fillers, and trim by linear foot. Routes to the kitchen and bath calculators. ANSI/KCMA & BHMA standards.
Countertop Calculator
Net square feet, slab count, edge linear feet, seams, weight, and cost — granite, quartz, marble, quartzite, butcher block, solid surface, laminate, concrete. NSI, ANSI/ISFA, NKBA standards.
Kitchen Cabinets Calculator
Cabinet count, doors, drawers, hinges, slides, knobs, pulls, panels, trim, and install cost by tier — RTA, stock, semi-custom, custom. ANSI/KCMA & NKBA standards.
Concrete & Rebar
3 calculatorsBags of Concrete Calculator
How many 40, 50, 60, or 80 lb bags of concrete you need for a slab, footing, or post holes — plus a bags-to-cubic-yards converter.
Concrete Calculator
Calculate concrete volume and material requirements for slabs, footings, and foundations.
Rebar Calculator
Estimate reinforcing steel — bar count by direction, linear feet, weight, sticks to buy, and lap length for slabs, footings, and round pads.
Paint & Wallpaper
3 calculatorsExterior Paint Calculator
Estimate paint requirements for exterior walls, siding, and trim.
Interior Paint Calculator
Calculate interior paint requirements for walls, ceilings, and trim.
Wallpaper Calculator
Bolts (double-rolls), single-roll equivalents, strips, paste, and primer — with pattern repeat and half-drop match math. Per ASTM F793, IBC §803, and major install guides.
Foundations & Drainage
3 calculatorsFooting Size Calculator
What size footing for a foundation wall? Minimum width and thickness by story count, foundation type, soil bearing, and snow load, straight from IRC Table R403.1(1).
French Drain Calculator
Gravel in cubic yards and tons, perforated-pipe linear feet, filter-fabric square footage with a roll recommendation, excavation and spoil, plus a 1% slope pass/fail check. IRC R405.1 / ASTM #57 stone / AASHTO M288.
Retaining Wall Calculator
Blocks, caps, adhesive, base & drainage stone, drain pipe, geogrid, rebar, timber, boulders, or gabion baskets for SRW, poured concrete, CMU, timber, boulder, or gabion walls. NCMA / IRC R404.4.
Frequently Asked Questions
Common questions about using our free construction material calculators.
How accurate are these calculators?
Our calculators use industry-standard formulas and include typical waste factors recommended by manufacturers and trade associations. Results are estimates — actual material needs may vary based on site conditions, installer technique, and product-specific coverage rates. Always verify with your supplier before purchasing.
Do I need to create an account to use the calculators?
No account is needed for any of the free calculators. All tools are free to use.
What is the waste factor and why does it matter?
A waste factor accounts for cuts, breakage, and installation error. For example, tile layouts typically add 10–15% to cover cuts around edges and obstacles. Skipping a waste factor often means running short mid-project, which can result in dye-lot mismatches or costly delays.
Can I use these calculators on my phone?
Yes. Every calculator is fully responsive and works on phones and tablets. Many contractors use them on-site to generate quick estimates before ordering materials.
How do I get a detailed cost estimate?
Enter unit costs directly into the calculator to get an automatic material cost total alongside your quantity estimate.
Building Code & Climate Guides
Cited references on the codes and climate-zone requirements that shape every calculator on this site.
Climate Zone 5: R-Value Requirements (2021 IECC)
Cool Climate Zone 5 R-value minimums for Pennsylvania, New York, Michigan, Illinois, Iowa, and the Pacific Northwest interior under the 2021 IECC.
FBC 8th Edition (2023), effective Dec 31, 2023Florida HVHZ Roofing Requirements
Florida HVHZ wind-zone roofing rules: shingle ratings, fastener schedules, NOA approval, and underlayment per FBC 8th Edition (2023) and Miami-Dade County.
2025 Title 24 Part 6 (effective Jan 1, 2026)California Title 24 Part 6: Envelope Requirements
California Title 24 Part 6 envelope, cool-roof, and prescriptive insulation requirements by climate zone for residential — 2025 cycle effective Jan 1, 2026.
780 CMR 10th Edition (sole effect since June 30, 2025) + 225 CMR 22 (Stretch) / 225 CMR 23 (Specialized)Massachusetts Stretch Energy Code
Massachusetts Stretch Energy Code envelope, HERS, and electrification requirements for residential construction in opt-in municipalities.
Construction Diagrams & Visual Guides
Explore 366 free, technical construction diagrams — cross-sections, assemblies, spacing schedules, and measurement figures that show exactly how each material goes together. Every diagram is grounded in building code and industry standards and links back to the calculator it belongs to.
Learn from the Experts
Industry-standard guides with no marketing fluff. Professional techniques, measurements, and specifications.
How to Measure Your Room
Step-by-step guide to accurately measure walls, calculate square footage, and account for openings. Professional measurement techniques.
When You Need Primer
Industry guidelines on primer requirements with no marketing BS. Learn when primer is required, optional, or unnecessary.
Choosing the Right Paint Sheen
Complete comparison of flat, eggshell, satin, semi-gloss, and gloss finishes with room-by-room recommendations.
Complete Interior Painting Guide
Professional start-to-finish painting guide covering planning, prep, application, and finishing. Industry standards throughout.
All guides based on industry standards from ACI, NWFA, PDCA, PCA, MPI, NRCA and more
