Home calculators
Free professional home calculators with verified formulas and step-by-step solutions.
Board Foot Calculator
Calculate board feet from thickness in inches, width in inches, and length in feet. Includes hardwood preset sizes, optional price per BF fo…
OpenRoof Pitch Calculator
Convert between roof pitch ratio (x:12), angle in degrees, and percent slope. Includes rafter length from horizontal run and material compat…
OpenGravel Calculator
Estimate how much gravel you need by length, width, and depth. Outputs cubic yards and metres, US and metric tons, plus optional cost. Six g…
OpenSquare Footage Calculator
Calculate square footage for any common shape - rectangle, triangle, circle, or trapezoid. Input in feet, inches, yards, metres, or centimet…
OpenConcrete Slab Calculator
Compute concrete slab volume in cubic yards or cubic meters. Outputs bag counts for 60-lb and 80-lb mixes plus a cost estimate at typical re…
OpenSquare Yards Calculator
Multiply length by width to get square yards (yd²) for carpet pricing, fabric yardage, landscaping, and concrete coverage. 1 yd² = 9 ft² = 0…
OpenPipe Volume Calculator
Compute pipe interior volume from inner diameter and length. Supports inches, feet, metres, centimetres, and millimetres on inputs; outputs …
OpenSquare Feet to Cubic Yards Calculator
Compute the cubic yards needed for any area in square feet at a given depth. Outputs cubic yards, cubic feet, cubic metres, approximate weig…
OpenFraming Calculator
Wood wall framing estimator. Pick wall length, height, stud spacing, and openings - get a stud count, top and bottom plate length, and a hea…
OpenRoof Shingle Calculator
Estimate the number of shingle bundles and roofing squares needed for a residential roof. Inputs include footprint or sloped area, pitch (ra…
OpenRebar Calculator
Plan rebar for a concrete slab in seconds. Enter slab length and width, pick a bar size (#3 through #8) and on-center spacing (12, 16, 18, o…
OpenTank Volume Calculator
Calculate tank capacity for four shapes: rectangular, vertical cylinder, horizontal cylinder, and oval (elliptical horizontal). Enter dimens…
OpenSquare Meter Calculator
Compute area in square metres for the four most common floor and lot shapes: rectangle, triangle, circle, and trapezoid. Enter dimensions in…
OpenFlooring Calculator
Calculate how much flooring you need from room dimensions and waste percentage. Outputs total square footage, boxes required, and cost. Supp…
OpenRafter Length Calculator
Find the exact rafter length from horizontal run and roof pitch. Uses the Pythagorean theorem with optional overhang and hip/valley factor. …
OpenSand Calculator
Calculate how much sand you need from length, width, and depth. Outputs cubic yards and metres, US and metric tons, plus 50 lb and 25 kg bag…
OpenBrick Calculator
Calculate how many bricks you need from wall length, height, brick size, and mortar joint. Outputs bricks per square foot, total bricks with…
OpenCubic Yard Calculator
Calculate cubic yards from length, width, and depth. Outputs cubic yards, cubic metres, cubic feet, and material weight in US and metric ton…
OpenCFM Calculator
Calculate the CFM (cubic feet per minute) required for a room based on its dimensions and target air changes per hour (ACH). The CFM calcula…
OpenRamp Slope Calculator
Enter rise and run in inches/feet or centimeters. Returns slope ratio, angle, percent, ramp length, and an ADA accessibility compliance chec…
OpenCrushed Stone Calculator
Calculate how many cubic yards and tons of crushed stone you need for a driveway, patio, drain field, or base layer. Pick the stone type (#5…
OpenBeam Deflection Calculator
Calculate maximum deflection of a beam under load. Supports simply-supported, cantilever, and fixed-fixed beams with point or uniform loads.…
OpenGallons Per Minute (GPM) Calculator
Measure water flow rate in gallons per minute from a known volume and time. Convert GPM to liters per minute, cubic feet per minute, gallons…
OpenRiver Rock Calculator
Calculate exactly how much river rock you need by length, width, and depth. Pick a stone grade (pea gravel through boulders), add a waste fa…
OpenConcrete Block Calculator
Estimate the number of concrete blocks and mortar bags needed for any CMU wall. Enter wall length, height, opening area, and block size. Def…
OpenElevation Grade Calculator
Elevation grade calculator that turns rise over run into a percent grade, an angle in degrees, and a 1:X slope ratio. Works in feet or meter…
OpenConcrete Weight Calculator
Compute the weight of a concrete pour from volume in cubic yards, cubic feet, or cubic meters. Outputs pounds, kilograms, short tons, and me…
OpenGallons Per Square Foot Calculator
Estimate gallons of paint, primer, stain, sealant or epoxy needed for any area. Inputs: square footage, coverage rate (typical 350 sq ft per…
OpenTile Calculator (Floors, Walls, Grout)
Enter room dimensions, tile size, and a waste factor to get the exact tile count, number of boxes, and grout bag estimate. Built on the Tile…
OpenPlywood Calculator
Calculate the number of plywood sheets needed for a project from area and sheet size. Standard 4 by 8 ft (32 sq ft) is the default; 4x10, 4x…
OpenRoofing Calculator
Estimate roof area, squares, and shingle bundles from house dimensions or a measured area, plus pitch and waste. One roofing square equals 1…
OpenSonotube Calculator
Concrete tube form calculator. Enter diameter and height, and get volume in cubic yards, cubic feet, and cubic metres, plus the number of 60…
OpenPaver Calculator
Calculate pavers needed for a patio or walkway from area and paver size. Adjusts for joint width, pattern waste (running bond, herringbone, …
OpenFence Calculator
Estimate the materials needed to build a residential fence. Enter the perimeter (or length and width of a rectangular yard), post spacing, p…
OpenSteel Plate Weight Calculator
Compute the weight of a rectangular steel plate from length, width, and thickness, using a density of 7850 kg/m^3 for carbon steel grades A3…
OpenAluminum Weight Calculator
Calculate the weight of aluminum plates, round bars, and tubes from dimensions. Supports alloys 1100, 6061, 5052, 7075, and 2024 with their …
OpenAsphalt Calculator
Calculate tons of asphalt for a driveway or parking lot from length, width, and depth. Outputs short tons, metric tonnes, cubic feet, 60-lb …
OpenConcrete Driveway Cost Calculator
Estimate concrete driveway cost from length, width, thickness, and price per square foot. Outputs cubic yards (with 10% waste), total instal…
OpenAir Changes Per Hour Calculator
Compute ACH (air changes per hour) for any room. Enter dimensions or volume and airflow in CFM or m³/h. Compare against ASHRAE targets …
OpenAir Conditioner Room Size Calculator
Size your air conditioner correctly. Energy Star 20 BTU/ft² baseline adjusted for insulation, sun exposure, ceiling height, and occupants. O…
OpenDecking Calculator
Estimate how many deck boards you need plus screw count and material cost. Enter deck length and width, board size, gap, and waste percentag…
OpenGlass Weight Calculator
Calculate the weight of a glass pane from length, width and thickness. Picks float (2500), tempered, laminated, borosilicate or lead crystal…
OpenSteel Weight Calculator (Plate, Bar, Tube)
Calculate the weight of steel plate, round bar, square bar and tube from dimensions. Density 7850 kg/m³ default; switch to stainless, cast i…
OpenFloor Joist Calculator
Look up allowable floor joist spans from the 2021 IRC for 2x6, 2x8, 2x10, and 2x12 lumber. Choose Douglas Fir, Southern Pine, SPF, or Hem-Fi…
OpenMetal Roof Cost Calculator
Find the installed cost of a metal roof. Choose corrugated, standing seam, metal shingles, stone-coated steel, aluminum, copper, or zinc. In…
OpenAC Tonnage Calculator - HVAC Sizing by Square Feet
Estimate the right size air conditioner in tons for your home. The AC tonnage calculator factors square feet, climate zone, insulation and s…
OpenDrywall Calculator
Count drywall sheets and finishing material for any room. Standard 4x8 (32 sq ft) or 4x12 (48 sq ft) panels, includes ceiling, deducts doors…
OpenVinyl Siding Calculator
Estimate the vinyl siding materials for a house. Enter the average wall length, wall height, number of sides, and the total area of windows …
OpenRolling Offset Calculator
Solve a pipe rolling offset in seconds. Enter the rise (vertical offset), roll (horizontal offset), and fitting angle. The calculator return…
OpenFence Picket Calculator
Count the pickets needed for any wood fence run. Enter the fence length, picket width (typical 3.5 or 5.5 in), and gap between pickets. The …
OpenAC Tonnage Calculator
Find the right air conditioner size in tons and BTU/h. Calculates from square footage and adjusts for climate, insulation, sun, and occupanc…
OpenAngle Cut & Miter Calculator
Calculate miter cut angles for polygons (3–100 sides), rafter pitches, and odd corner angles. Gets miter saw settings right the first time.
OpenAngle of Depression Calculator
Find the downward viewing angle from an elevated point. Solves three modes: angle from height and distance, height from angle and distance, …
OpenArch Calculator
Compute arch geometry from span and rise. Handles circular and parabolic arches, returns radius, arc length, enclosed area, central angle, a…
OpenBaluster Calculator
Find how many balusters you need for a railing of any length while staying within the 4-inch building-code gap. Handles US (4 in) and EU/UK …
OpenBeam Load Calculator
Find the maximum safe load on a wood, steel, or concrete beam. Computes max moment, shear, bending stress, section modulus, and a safe-load …
OpenBeam Load Quiz
Practice beam-load problems interactively. Random problems on max bending moment, shear, and reactions for simply-supported, cantilever, and…
OpenBending Stress Calculator
Compute bending stress from moment, geometry, and section properties. Handles rectangular, circular, and custom (I, c) sections. Bidirection…
OpenBirdsmouth Cut Calculator
Lay out the rafter notch that lets a rafter sit flat on the top wall plate. Returns plumb-cut angle, seat-cut angle, bearing length, and a 1…
OpenBoard and Batten Siding Calculator
Estimate the boards, battens, linear feet, and board feet you need for board-and-batten siding. Handles wall openings (windows and doors) an…
OpenBoard-on-Board Fence Calculator
Estimate boards, posts, concrete, and total cost for a board-on-board privacy fence. The two-layer pattern with overlap eliminates sight gap…
OpenBoiler Size Calculator
Estimate the heating capacity (kW or BTU/hr) needed for your home. Based on the ISO 12831 method: floor area × insulation factor × climate Δ…
OpenBolt Circle Calculator
Calculate bolt circle (PCD) coordinates, hole spacing angle, chord distance, and per-bolt X/Y positions for circular fastener patterns. Supp…
OpenBolt Torque Calculator
Calculate the recommended tightening torque for a metric bolt by diameter and ISO 898-1 strength grade. Adjusts for lubrication (K factor) a…
OpenBowl Segment Calculator
Calculate miter bevel angle and chord lengths for segmented woodturning bowls and rings. Supports any stave count from 3 to 48 and any wall …
OpenBox Fill Calculator (NEC 314.16)
Calculate electrical box fill per NEC 314.16. Adds up conductor, device, internal-clamp, and equipment-ground allowances to confirm a box ha…
OpenCable Sag Calculator
Compute the sag of a suspended cable from span length, cable weight, and horizontal tension — or solve for tension given sag. Returns …
OpenCarbon Equivalent Calculator (CE / CEV)
Calculate the carbon equivalent (CE) of a steel from its chemical composition. Uses the IIW or AWS formula to predict weldability, preheat n…
OpenCarpet Calculator (Square Yards)
Convert room dimensions to square yards or square meters of carpet, with adjustable waste factor and optional price-per-yard for total cost.
OpenCement Calculator (Bags Needed)
Calculate cement bags, sand, gravel, and water needed for a concrete pour. Choose 1:2:4, 1:1.5:3, or other common mix ratios with US 94-lb o…
OpenChicken Coop Size Calculator
Calculate coop floor area, run space, nest box count, and perch length for any flock size and breed. Includes climate adjustments for cold o…
OpenClearance Hole Calculator
Get the correct drill bit size for clearance holes through which bolts and screws pass freely. Supports metric (ISO 273) and inch (ANSI B18.…
OpenConcrete Block Fill Calculator (Grout)
Calculate grout volume needed to fill the cells of a concrete block (CMU) wall. Supports 4 to 12 inch block sizes and every-cell, every-othe…
OpenConcrete Column Calculator
Cylindrical concrete column volume calculator. Returns cubic yards, cubic meters, bag counts for 60- and 80-lb pre-mix, and estimated cost.
OpenConcrete Cylinder Calculator
Cylindrical concrete volume calculator. Enter diameter and depth for Sonotube footings. Outputs yd³, bag counts, concrete weight, and cost e…
OpenConcrete Stairs Calculator
Volume calculator for stepped concrete stairs. Returns cubic yards, number of steps, riser/tread dimensions, stringer length, and 2R+T comfo…
OpenConcrete Tube Calculator
Sonotube concrete tube calculator. Returns required bag count (40 lb, 60 lb, or 80 lb), volume in cubic yards and meters, and pour weight.
OpenCountersink Depth Calculator
Computes required drilling depth for a countersink hole using d = (D/2) / tan(angle/2). Supports 60°, 82°, 90°, 100°, and 120° tools.
OpenCuboid Weight Calculator
Calculate weight (mass) of any rectangular cuboid from dimensions and material density. Inputs: L, W, H plus unit, material density preset o…
OpenDeck Stain Calculator
Deck stain volume calculator. Input deck length, width, railings, and stain type to get gallons needed for 1, 2, or 3 coats with 5% spillage…
OpenDIY Shed Cost Calculator
Calculates total cost to build a backyard shed yourself. Itemizes foundation, lumber, roofing, hardware, and optional contractor labor at 20…
OpenDoor Header Size Calculator
Calculates structural header beam size for door openings. Supports load-bearing and non-bearing walls, with snow zone and floor load adjustm…
OpenEpoxy Calculator
Calculates epoxy volume in gallons, liters, and fluid ounces. Splits total into Part A (resin) and Part B (hardener) at your specified mix r…
OpenFence Cost Calculator
Calculates total fencing project cost from length, material type, and gate count. Itemizes materials, posts, concrete, gates, labor, and per…
OpenFence Estimate Calculator
Estimate a complete fence project cost. Inputs include linear feet, material (wood, vinyl, chain link, aluminum), fence height, number of ga…
OpenFence Material Calculator
Build a complete fence material list. Inputs include fence length, height, post spacing, picket width and gap, post size and rails per secti…
OpenFence Perimeter Calculator
Compute the perimeter of a lot for fencing. Supports rectangle, square, circle, triangle and regular polygon shapes. Outputs total perimeter…
OpenFence Post Depth Calculator
Find the right buried depth for a fence post. Uses the 1/3 rule, wind exposure factor, soil-type adjustment and local frost-line minimum. Ou…
OpenFire Flow Calculator
Find the needed fire flow (NFF) in gallons per minute. Three methods: National Fire Academy (NFA) 1/3 rule, Iowa State University (ISU) volu…
OpenFire Glass Calculator
Find how much fire glass you need for any fire pit or burner. Inputs include rectangular or round shape, dimensions in inches, glass depth (…
OpenFloor Area Ratio Calculator
Compute floor area ratio (FAR) for zoning compliance. Inputs: gross floor area (GFA), lot area, and the maximum allowed FAR set by the local…
OpenFrench Drain Calculator
Plan a french drain installation. Inputs include drain length, trench width and depth, perforated pipe size, and slope percentage. Outputs g…
OpenFurnace Size Calculator
Estimate the furnace BTU output needed for a home. Inputs: heated square footage, US climate zone 1-5, insulation quality, ceiling height, n…
OpenGambrel Roof Calculator
Compute the geometry of a gambrel (barn-style) roof. Inputs: span (building width), ridge length, lower pitch, upper pitch and overhang. Out…
OpenGravel Driveway Calculator
Calculate gravel needed for a driveway from length, width, and depth. Outputs cubic yards and metres, US and metric tons, area covered, and …
OpenGrout Calculator
Calculate how much grout you need from surface area, tile dimensions, joint width, and joint depth. Outputs volume in litres, weight in kilo…
OpenHeat Loss Calculator
Calculate total building heat loss from U-values, surface areas, indoor and outdoor temperatures, and air change rate. Outputs transmission …
OpenHole Volume Calculator
Calculate the volume of any hole or pit from diameter or length × width and depth. Supports cylindrical post holes, rectangular pits, and co…
OpenHoop House Calculator
Plan a hoop house or high tunnel: enter length, base width, peak height, and hoop spacing. Outputs arc radius, pipe length per hoop, number …
OpenInsulation Calculator
Calculate insulation thickness needed for a target R-value by climate zone and application. Outputs required thickness in inches and centime…
OpenJunction Box Sizing Calculator
Calculate the minimum cubic-inch volume needed for an electrical junction box per NEC 314.16. Counts conductors, internal clamps, devices on…
OpenK-Factor Calculator
Calculate sheet metal bend parameters from material thickness, inside bend radius, bend angle, and K-factor. Outputs bend allowance (BA), ou…
OpenLadder Angle Calculator
Calculate the safe ladder lean angle from height and base distance, or solve for the ladder length needed for a target height. Uses OSHA 75.…
OpenLimestone Calculator
Calculate the cubic yards and tons of limestone needed for driveways, paths, agricultural lime, and landscape fill. Five limestone densities…
OpenLiters per Minute Calculator
Compute L/min flow rate from volume and time. Convert to GPM (US/UK), m³/hour, L/sec, and CFM. Three solve modes: flow rate, volume, or time…
OpenLog Weight Calculator
Estimate the weight of a round log (firewood, sawlog, milling stock) from diameter, length, species and moisture content. Uses cylinder volu…
OpenLumber Calculator
Calculate total board feet for a project with mixed lumber sizes. Add rows for 2x4, 2x6, 2x10, etc., get BF subtotal, linear feet, cubic vol…
OpenLumber Weight Calculator
Compute weight of dimensional lumber from nominal size, species, and moisture content. Pine SPF at 35 lb/ft³ reference; oak, maple, walnut t…
OpenMaterial Removal Rate Calculator
Compute MRR for milling (ADOC × RDOC × feed), turning (depth × feed/rev × Vc), and drilling (π/4 × D² × feed). Output in cm³/min, mm³/min, i…
OpenMetal Weight Calculator
Compute weight of metal parts from shape and dimensions. 13 alloys (steel, stainless, aluminum, copper, brass, titanium). 5 shapes (plate, r…
OpenMiter Angle Calculator
Solve miter angle for any corner, polygon side count (3 to 100), or compound crown-molding cut with wall and spring angles. Outputs decimal …
OpenMortar Calculator
Estimate mortar bags, cement sacks, lime bags, and sand for a brick or CMU block wall. ASTM C270 mortar types N/S/M/O. Cubic feet of mortar …
OpenPaint Calculator
Estimate gallons (or liters) of paint needed for a room. Uses 350 sq ft per gallon as the standard coverage, deducts doors and windows, appl…
OpenPaver Sand Calculator
Estimate paver bedding sand: cubic yards, tons, and bags for a patio of any size. Concrete sand (ASTM C33) at 1-inch depth is the ICPI stand…
OpenPipe Weight Calculator
Steel pipe weight calculator for ASME B36.10M sizing. Enter outside diameter, wall thickness, and length to get weight per foot in lb/ft and…
OpenPipe Weight Quiz
Interactive pipe weight quiz with ten random problem types covering Schedule 40 and 80 carbon steel, stainless, and aluminum pipe. Score and…
OpenPitch Diameter Calculator
Three-mode pitch diameter calculator. Compute gear pitch diameter from teeth and diametral pitch (imperial), teeth and module (metric), or c…
OpenPlate Weight Calculator
Calculate the weight of metal plates from length, width, and thickness. Supports carbon steel, stainless 304/316, aluminum 6061, copper, bra…
OpenPond Calculator
Garden pond calculator. Compute water volume, pond liner area, pump turnover rate, and koi or ornamental fish capacity for rectangular and c…
OpenPool Volume Calculator
Swimming pool volume calculator for rectangular, round, and oval pools. Computes gallons, litres, cubic meters, chemical doses, water weight…
OpenPost Hole Concrete Calculator
Post hole concrete calculator. Compute the number of bags of concrete needed for fence posts, deck posts, and pergola posts from hole diamet…
OpenPrivacy Fence Calculator
Privacy fence calculator for wood fences 6–8 ft tall. Compute the number of posts, rails, pickets, concrete bags, total cost, and cost per l…
OpenPunch Force Calculator
Sheet metal punch press tonnage calculator. Computes the force required to punch round, square, or rectangular holes through carbon steel, s…
OpenRetaining Wall Calculator
Retaining wall calculator for segmental concrete block walls. Outputs total block count, base trench and drain gravel volume, max unreinforc…
OpenRip Rap Calculator
Estimate tons of riprap stone for shoreline protection, channel armoring, and slope stabilization. Inputs: length, width, layer thickness, s…
OpenRivet Size Calculator
Find the right rivet diameter, length, and hole size for any joint. Uses the 3 × thickness rule for normal stock and Unwin formula (d = 6.05…
OpenRoad Base Calculator
Estimate aggregate base course needed for driveways, parking lots, and gravel roads. Inputs: length, width, depth, material type, compaction…
OpenRoof Truss Calculator
Estimate roof truss count, dimensions, and load for residential framing. Inputs: roof length, span, pitch, spacing, roofing material, snow l…
OpenRound Pen Calculator
Plan a horse training round pen with this calculator. Inputs: diameter, panel length, height, material, gates. Returns circumference, panels…
OpenSealant / Caulk Calculator
Estimate caulk and sealant tubes for a joint or bead. Inputs: joint length, width, depth, tube size, waste %. Returns total volume in mL, nu…
OpenShiplap Calculator
Estimate how many shiplap boards you need to cover a wall with rabbeted overlap. Inputs: wall width, height, board size, overlap, openings, …
OpenSiding Calculator
Estimate exterior siding material for a house. Inputs: house perimeter, wall height, gable area, openings, material type. Returns gross/net …
OpenSnow Load Calculator
Roof snow load per ASCE 7-22: p_s = 0.7 × Ce × Ct × Is × pg × Cs. Inputs include ground snow load (psf), exposure, thermal, importance facto…
OpenSpindle Spacing Calculator
Compute the number of balusters and even on-center spacing for a railing. Enforces the IRC R312 4-inch sphere rule (4-3/8 in for stairs). In…
OpenSpindle Speed Calculator (RPM)
CNC and machine shop spindle speed calculator. Imperial: RPM = SFM × 12 / (π × inches). Metric: RPM = m/min × 1000 / (π × mm). Material pres…
OpenSpiral Staircase Calculator
Geometry calculator for spiral stairs. Computes rise per step, tread angle, walkline radius (2/3 rule), tread depth, pitch, and code complia…
OpenSquare Yard Calculator
Compute floor and lot area in square yards from rectangle, circle, triangle, or trapezoid dimensions. Returns sq ft, sq m, sq in, and acres.…
OpenStair Carpet Calculator
How much carpet for stairs. Calculates linear length and square yards for waterfall and wrapped (Hollywood) installation methods. Includes 1…
OpenStairs Calculator (Rise & Run)
Sizes residential stairs to IRC R311.7. Inputs total rise and tread depth - returns optimal riser count, actual riser height, stringer lengt…
OpenStone Calculator (Tons & Cost)
Compute cubic yards and tons of landscape stone needed for a project. Six density presets (crushed stone, pea gravel, river rock, limestone,…
OpenStone Weight Converter (UK)
Convert body weight between stones, pounds, and kilograms. UK Imperial unit: 1 stone = 14 lb = 6.35029 kg. Used in UK, Ireland, and Commonwe…
OpenTaper Calculator (TPF, Angle, Ratio)
Compute taper ratio, taper per foot (TPF), half angle, and included angle from large and small diameters and taper length. Includes Morse ta…
OpenThread Pitch Calculator
Enter TPI or metric pitch and the thread pitch calculator returns the other unit, lead (pitch times number of starts), and helix angle in de…
OpenThread Tap Drill Calculator
Pick the thread system (UNC, UNF, or Metric) and the nominal size, and the thread calculator returns the right tap drill, major and minor di…
OpenTrue Position Calculator (GD&T)
Inspection tool for ASME Y14.5 true position tolerance. Enter the nominal and measured X and Y coordinates of a hole or pin and the calculat…
OpenTrump Probability Calculator (Cards)
Card-game probability tool for trick-taking games. Enter trumps held by your side and the calculator returns the probabilities of each oppon…
OpenVertical Curve Calculator (AASHTO)
Civil engineering tool for roadway design. Enter entry and exit grades plus the K-value for design speed and the calculator returns curve le…
OpenVinyl Fence Calculator
Materials estimator for vinyl (PVC) fence installation. Enter total length, panel width, and post spacing - the calculator returns panel cou…
OpenVinyl Fence Cost Calculator
Total project cost for vinyl PVC fencing. Choose style (picket, semi-privacy, privacy), height (3-6 ft), region (rural to urban), and gate c…
OpenWainscoting Calculator
Material estimator for wainscoting installation. Enter wall length, wainscot height, panel and stile widths - the calculator returns the num…
OpenWall Square Footage Calculator
Wall area calculator for paint, drywall, wallpaper, or siding estimates. Enter wall length, height, count, and openings (doors and windows) …
OpenWallpaper Calculator (Rolls Needed)
Rolls-needed estimator for wallpaper. Adjusts for pattern repeat (straight match, drop match, no match) and subtracts standard door and wind…
OpenWelding Calculator
Compute weld cross-section, volume, filler-rod weight, and arc heat input for fillet, butt, and groove welds. Default density is mild steel …
OpenWood Beam Span Calculator
Find the maximum span of a sawn-lumber beam given species, actual dimensions, and uniform load. Checks both bending and L/360 deflection.
OpenWood Fence Calculator
Plan your wood fence build with a clear material breakdown: posts, rails, pickets, lumber linear feet, concrete bags, and optional pricing.
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