Construction Calculators

Estimate materials, dimensions, and project quantities for construction and home improvement work.

Home & Garden

Air Conditioner BTU Calculator The Air Conditioner BTU Calculator estimates the cooling capacity (in BTU/hr) needed to cool a room, based on its dimensions, climate, sun exposure and number of occupants. It also converts the result into tonnes of cooling and kilowatts. Boiler Size Calculator Estimate the right boiler size in kW for your home from its floor area, insulation quality, and climate. Enter your house area and conditions to get a recommended boiler output with a safety buffer. Carpet Calculator Work out how much carpet you need for a room. Enter the room length and width, the carpet roll width, and how much wastage to allow, and this calculator gives the area to order plus how many metres of roll you'll need. Deck Calculator Deck Calculator is a construction estimator that helps you calculate deck values from your input data. The formula used is: Boards across = ceil(Width / (Board Width + Gap)); Total length = Boards across × Deck Length; Boards = ceil(Total length / Board Length). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Electrical Load Calculator Electrical Load Calculator is a construction estimator that helps you calculate electrical load values from your input data. The formula used is: TotalW = Lights×W + Fans×W + ACs×W + Other; kW = W/1000; Monthly = kW×8×30; A = W/220. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Epoxy Flooring Calculator Epoxy Flooring Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Area = L×W; Coverage = Area×Coats; Litres = Coverage/CoveragePerLitre; +10% waste. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Fence Calculator Fence Calculator is a construction estimator that helps you calculate fence values from your input data. The formula used is: Sections = ceil(Perimeter / Post Spacing); Posts = Sections + 1; Rails = Sections × Rails per section; Pickets = ceil(Perimeter / Picket Width). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Flooring Cost Calculator Flooring Cost Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Area = L×W; MaterialCost = Area×(1+Wastage%)×Price; Total = MaterialCost + Area×InstallCost. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Heat Loss Calculator Heat Loss Calculator is a construction estimator that helps you calculate heat loss values from your input data. The formula used is: HeatLoss (W) = Area × U-Value × (T_indoor − T_outdoor). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Kitchen Backsplash Calculator Kitchen Backsplash Calculator is a construction estimator that helps you calculate kitchen backsplash values from your input data. The formula used is: Area = Length × Height; Tiles = ⌈Area / TileSize² × (1+Wastage%)⌉. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Ladder Angle Calculator Ladder Angle Calculator is a construction estimator that helps you calculate ladder angle values from your input data. The formula used is: Angle = acos(Height/LadderLength); BaseDistance = √(Ladder²−Height²); 4:1 Base = Height/4. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Paint Calculator Paint Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Wall Area = 2 × (Length + Width) × Height − Doors × 1.8 − Windows × 1.2; Litres = Area × Coats / 10. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Pool Volume Calculator Pool Volume Calculator is a construction estimator that helps you calculate the volume of a three-dimensional shape or container. The formula used is: Rectangular: L × W × D; Circular: π × (D/2)² × Depth; Oval: π/4 × L × W × Depth; Litres = m³ × 1000; Fill hours = Litres / Pump rate. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Rug Size Calculator Rug Size Calculator is a construction estimator that helps you calculate rug size values from your input data. The formula used is: Full: (L−0.6)×(W−0.6); Under furniture: L×0.7 × W×0.7; Accent: L×0.4 × W×0.4. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Solar Panel Calculator Solar Panel Calculator is a construction estimator that helps you calculate solar panel values from your input data. The formula used is: DailyKwh = Monthly/30; SystemKw = Daily/(SunHrs×Eff%); Panels = ⌈SystemKw×1000/PanelW⌉. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Stair Calculator Stair Calculator is a construction estimator that helps you calculate stair values from your input data. The formula used is: Steps = ceil(Rise / Riser Height); Total Run = Steps × Tread; Stringer = √(Rise² + Run²). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Stair Rise and Run Calculator Stair Rise and Run Calculator is a construction estimator that helps you calculate stair rise and run values from your input data. The formula used is: Steps = round(Height/Riser); ActualRiser = Height/Steps; TotalRun = Steps×Tread; Stringer = √(Height²+Run²). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Tank Volume Calculator Tank Volume Calculator is a construction estimator that helps you calculate the volume of a three-dimensional shape or container. The formula used is: Cylinder: π×(D/2)²×H; Rectangular: L×W×H; Horizontal cyl: π×(D/2)²×L; Litres = m³ × 1000. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Ventilation / ACH Calculator Ventilation / ACH Calculator is a construction estimator that helps you calculate ventilation / ach values from your input data. The formula used is: Volume = L×W×H; m³/hr = Volume × ACH; CFM = m³/hr × 35.3147 / 60. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Wallpaper Calculator Wallpaper Calculator is a construction estimator that helps you calculate wallpaper values from your input data. The formula used is: Strips needed = ceil(Perimeter / Roll Width); Strips per roll = floor(Roll Length / Wall Height); Rolls = ceil(Strips / Strips per roll). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Window Size Calculator Window Size Calculator is a construction estimator that helps you calculate window size values from your input data. The formula used is: MinGlazing = FloorArea × 10%; WindowCount = ⌈MinGlazing / WindowArea⌉. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input.

Construction Materials

Bathroom Tile Calculator Estimate how many tiles you need to tile a bathroom floor and walls. Enter the floor dimensions, the wall height and perimeter, your tile size and a wastage allowance, and the calculator works out the floor area, wall area, total area and the number of tiles to buy. Beam Load Calculator (Simple) Estimate the bending moment, shear force and deflection of a simply supported beam under a uniformly distributed load, a central point load, or both. Enter the span and loads to get the peak bending moment at midspan, the maximum shear at the supports, and an approximate deflection. Cubic Yard Calculator Cubic Yard Calculator is a construction estimator that helps you calculate cubic yard values from your input data. The formula used is: Volume = L × W × D; yd³ = m³ × 1.30795; ft³ = m³ × 35.3147. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Drywall Calculator Drywall Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Wall Area = 2 × (L + W) × H; Sheets = ceil(Wall Area / Sheet Area × (1 + Wastage/100)). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Flooring Calculator Flooring Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Area = Length × Width; With wastage = Area × (1 + Wastage/100); Cost = Area with wastage × Price per m². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Gravel Calculator Gravel Calculator is a construction estimator that helps you calculate gravel values from your input data. The formula used is: Volume = Length × Width × Depth; Weight = Volume × 1680 kg/m³. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Grout Calculator Grout Calculator is a construction estimator that helps you calculate grout values from your input data. The formula used is: GroutVol/m² = (TileW+TileH)/(TileW×TileH) × JointWidth × TileThickness; Weight = Vol × Density. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Lumber Calculator Lumber Calculator is a construction estimator that helps you calculate lumber values from your input data. The formula used is: Volume (m³) = Pieces × Length × Width × Thickness; Board Feet = Volume × 423.776. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Pipe Volume Calculator Pipe Volume Calculator is a construction estimator that helps you calculate the volume of a three-dimensional shape or container. The formula used is: Volume = π × (d/2)² × Length; Litres = m³ × 1000. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Plywood Calculator Plywood Calculator is a construction estimator that helps you calculate plywood values from your input data. The formula used is: Sheet Area = Length × Width; Sheets = ceil(Total Area × (1 + Wastage%) / Sheet Area). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Room Area Calculator Room Area Calculator is a construction estimator that helps you calculate the area of a geometric shape from its dimensions. The formula used is: Area = Length × Width; Perimeter = 2 × (Length + Width); sq ft = m² × 10.7639. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Sand Calculator Sand Calculator is a construction estimator that helps you calculate sand values from your input data. The formula used is: Volume = Length × Width × Depth; Weight = Volume × 1600 kg/m³. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Siding Calculator Siding Calculator is a construction estimator that helps you calculate siding values from your input data. The formula used is: WallArea = Perimeter×Height − Doors×2.1 − Windows×1.5; Rows = ⌈Height/Exposure⌉; Boards = Rows × ⌈Perimeter/3.6⌉. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Square Footage Calculator Square Footage Calculator is a construction estimator that helps you calculate the square footage (area) of a room or shape. The formula used is: Rectangle: L×W; Circle: π×R²; Triangle: 0.5×Base×Height; Trapezoid: 0.5×(B1+B2)×H; sq ft = m² × 10.7639. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Steel Weight Calculator Steel Weight Calculator is a construction estimator that helps you calculate weight values or weight conversions between unit systems. The formula used is: Rebar: w/m = 0.00617 × d²; Flat bar: w × t × 7850 / 10⁶; Square: d² × 7850 / 10⁶; I-beam: table lookup. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Stone / Aggregate Calculator Stone / Aggregate Calculator is a construction estimator that helps you calculate stone / aggregate values from your input data. The formula used is: Volume = Length × Width × Depth; Weight = Volume × Density. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Tile Calculator Tile Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Tiles = ceil(Room Area / Tile Area × (1 + Wastage / 100)). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input.

Cement & Concrete

Brick Wall Calculator Estimate the number of bricks and the mortar volume for a brick wall from its length, height, and thickness. The calculator works out the wall volume, applies a standard brick density, and adds a 5% wastage allowance. Cement Calculator Cement Calculator is a construction estimator that helps you calculate cement values from your input data. The formula used is: Cement fraction = 1 / (1 + sand_ratio + aggregate_ratio); Cement kg = Volume × 1500 × cement_fraction; Bags = ceil(cement_kg / 50). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Column Footing / Foundation Calculator Column Footing / Foundation Calculator is a construction estimator that helps you calculate column footing / foundation values from your input data. The formula used is: Area = Load(N) / (Bearing(kPa)×1000); Size = √Area; Volume = Size²×Thickness×Columns. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Concrete Block / CMU Calculator Concrete Block / CMU Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Blocks per row = ceil(Length / (Block Width + Joint)); Rows = ceil(Height / (Block Height + Joint)); Total = ceil(Blocks × Rows × (1 + Wastage%)). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Concrete Column Calculator Concrete Column Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Volume = π × (d/2)² × height × count; Cement bags ≈ Volume × 320 / 50. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Concrete Slab Calculator Concrete Slab Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Volume = Length × Width × Thickness; Cement bags = Volume × 320 / 50. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Concrete Stairs Volume Calculator Concrete Stairs Volume Calculator is a construction estimator that helps you calculate the volume of a three-dimensional shape or container. The formula used is: Volume = Width × Riser × Tread × n(n+1)/2; CementBags = ⌈Volume×1.54×(1/7)×1440/50⌉. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Mortar Calculator Mortar Calculator is a construction estimator that helps you calculate mortar values from your input data. The formula used is: Plastering: Volume = Area × Thickness; Cement = Volume × 1350 / 5 / 50 bags (1:4 ratio). Brick jointing: ~0.3 bags cement + 1.05 bags sand per m².. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Rebar Calculator Rebar Calculator is a construction estimator that helps you calculate rebar values from your input data. The formula used is: Bars horizontal = ceil(Width / Spacing) + 1; Bars vertical = ceil(Length / Spacing) + 1; Standard bars = ceil(Total length / Bar length). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Thinset Mortar Calculator Thinset Mortar Calculator is a construction estimator that helps you calculate thinset mortar values from your input data. The formula used is: Bags = ⌈(Area / CoveragePerBag) × 1.1⌉. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Wall Plastering Calculator Wall Plastering Calculator is a construction estimator that helps you calculate wall plastering values from your input data. The formula used is: Volume = L×H×T; DryMortar = Volume×1.3; CementKg = DryMortar×1440×(C/Total); Bags = ⌈CementKg/50⌉. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input.

Tools

Clearance Hole Calculator Clearance Hole Calculator is a construction estimator that helps you calculate clearance hole values from your input data. The formula used is: Result = (Input 1 + Input 2) ÷ 2. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Concrete Driveway Cost Calculator Concrete Driveway Cost Calculator is a construction estimator that helps you calculate material quantities needed for a construction or renovation task. The formula used is: Tax = Amount × (Rate% ÷ 100). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Concrete Weight Calculator Concrete Weight Calculator is a construction estimator that helps you calculate weight values or weight conversions between unit systems. The formula used is: BMI = Weight ÷ Height². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Diy Shed Cost Calculator Diy Shed Cost Calculator is a construction estimator that helps you calculate diy shed cost values from your input data. The formula used is: Tax = Amount × (Rate% ÷ 100). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Elevation Grade Calculator Elevation Grade Calculator is a construction estimator that helps you calculate tax amounts on income, purchases, or transactions. The formula used is: Tax = Amount × (Rate% ÷ 100). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Fence Cost Calculator Fence Cost Calculator is a construction estimator that helps you calculate fence cost values from your input data. The formula used is: Tax = Amount × (Rate% ÷ 100). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Fence Perimeter Calculator Fence Perimeter Calculator is a construction estimator that helps you calculate fence perimeter values from your input data. The formula used is: C = 2 × π × r. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Gallons Per Square Foot Calculator Gallons Per Square Foot Calculator is a construction estimator that helps you calculate gallons per square foot values from your input data. The formula used is: N². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Glass Weight Calculator Glass Weight Calculator is a construction estimator that helps you calculate weight values or weight conversions between unit systems. The formula used is: BMI = Weight ÷ Height². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Hole Volume Calculator Hole Volume Calculator is a construction estimator that helps you calculate the volume of a three-dimensional shape or container. The formula used is: V = (4/3) × π × r³. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Log Weight Calculator Log Weight Calculator is a construction estimator that helps you calculate weight values or weight conversions between unit systems. The formula used is: BMI = Weight ÷ Height². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Lumber Weight Calculator Lumber Weight Calculator is a construction estimator that helps you calculate weight values or weight conversions between unit systems. The formula used is: BMI = Weight ÷ Height². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Material Removal Rate Calculator Material Removal Rate Calculator is a construction estimator that helps you calculate material removal rate values from your input data. The formula used is: (Part ÷ Whole) × 100. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Metal Roof Cost Calculator Metal Roof Cost Calculator is a construction estimator that helps you calculate metal roof cost values from your input data. The formula used is: Tax = Amount × (Rate% ÷ 100). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Metal Weight Calculator Metal Weight Calculator is a construction estimator that helps you calculate weight values or weight conversions between unit systems. The formula used is: BMI = Weight ÷ Height². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Punch Force Calculator Punch Force Calculator is a construction estimator that helps you calculate force from mass and acceleration using Newton's Second Law. The formula used is: F = ma. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Road Base Calculator Road Base Calculator is a construction estimator that helps you calculate pH or pOH from ion concentrations. The formula used is: pH 7.35-7.45 = Normal. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Size To Weight Rectangular Cuboid Calculator Size To Weight Rectangular Cuboid Calculator is a construction estimator that helps you calculate weight values or weight conversions between unit systems. The formula used is: BMI = Weight ÷ Height². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Spindle Speed Calculator Spindle Speed Calculator is a construction estimator that helps you calculate speed or velocity from a given distance and time. The formula used is: Speed = Distance ÷ Time. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Square Yard Calculator Square Yard Calculator is a construction estimator that helps you calculate square yard values from your input data. The formula used is: N². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Steel Plate Weight Calculator Steel Plate Weight Calculator is a construction estimator that helps you calculate weight values or weight conversions between unit systems. The formula used is: BMI = Weight ÷ Height². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Tonnage Calculator Tonnage Calculator is a construction estimator that helps you calculate the air-conditioning tonnage needed for a room from its area and cooling load. The formula used is: Tonnage = (Area × BTU/sqft) ÷ 12,000. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Vinyl Fence Cost Calculator Vinyl Fence Cost Calculator is a construction estimator that helps you calculate vinyl fence cost values from your input data. The formula used is: Tax = Amount × (Rate% ÷ 100). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Wall Square Footage Calculator Wall Square Footage Calculator is a construction estimator that helps you calculate the square footage of a wall from its dimensions. The formula used is: N². Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input.

Roofing

Metal Roofing Sheet Calculator Metal Roofing Sheet Calculator is a construction estimator that helps you calculate metal roofing sheet values from your input data. The formula used is: Effective Width = Sheet Width − Overlap; Effective Length = Sheet Length − Overlap; Sheets = ceil(Across × Along × (1 + Wastage%)). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Rafter Length Calculator Rafter Length Calculator is a construction estimator that helps you calculate rafter length values from your input data. The formula used is: Rafter = (Span/2) / cos(Pitch); RidgeHeight = (Span/2) × tan(Pitch). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Roof Area Calculator Roof Area Calculator is a construction estimator that helps you calculate the area of a geometric shape from its dimensions. The formula used is: Rafter Length = (Width / 2) / cos(pitch°); Roof Area = 2 × Length × Rafter Length. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Roof Pitch Calculator Roof Pitch Calculator is a construction estimator that helps you calculate roof pitch values from your input data. The formula used is: Angle = atan(Rise/Run); Ratio = (Rise/Run)×12; Rafter = √(Rise²+Run²). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Roof Shingle Calculator Roof Shingle Calculator is a construction estimator that helps you calculate roof shingle values from your input data. The formula used is: Actual Area = Plan Area × slope factor × 2; Bundles = ceil(Actual Area × (1+wastage%) / coverage per bundle). Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Roof Truss Calculator Roof Truss Calculator is a construction estimator that helps you calculate roof truss values from your input data. The formula used is: PeakHeight = (Span/2)×tan(Pitch); Rafter = (Span/2)/cos(Pitch); Trusses = ceil(Length/Spacing)+1. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input. Snow Load Calculator Snow Load Calculator is a construction estimator that helps you calculate snow load values from your input data. The formula used is: Load/m² = Depth × Density; PitchFactor = max(0, 1−(Pitch−30)/30) if Pitch>30°; Total = Load × Area × PitchFactor. Accepts imperial (feet, inches) or metric (metres, cm) units as labelled on each input.
Birdsmouth Cut Calculator Calculate the dimensions of a birdsmouth cut (seat cut and plumb cut) for a roof rafter based on roof pitch. Bricks Calculator Popular Estimate how many standard bricks you need for a wall from its length, height, and thickness. The calculator uses the common figure of about 13.5 bricks per cubic foot (for a 9×4.5×3 inch brick with mortar) and adds a 5% wastage allowance. Cable Sag Calculator Calculate the sag of a cable or wire rope under its own weight using parabolic approximation. Caulk & Sealant Calculator Calculate how many tubes of caulk or sealant you need for a given joint length. Cfm Calculator Calculate the required CFM (cubic feet per minute) of ventilation for a room based on volume and air changes per hour. Chicken Coop Size Calculator Calculate the minimum recommended chicken coop and run size based on flock size and breed. Concrete Block Calculator Calculate the number of concrete blocks needed to build a wall. Concrete Block Fill Calculator Calculate the volume of concrete fill needed to grout and fill concrete masonry unit (CMU) block cores. Concrete Cylinder Calculator Calculate the volume of concrete needed to fill a cylindrical form such as a column, sonotube, or post hole. Concrete Stairs Calculator Calculate the volume of concrete needed to pour a set of exterior concrete stairs. Concrete Tube Calculator Calculate the volume of concrete needed to fill a hollow tubular form (annular ring cross-section). Countersink Depth Calculator Calculate the countersink hole depth needed for a flat-head screw based on head angle and diameter. Crushed Stone Calculator Calculate how many tons or cubic yards of crushed stone are needed for a project. Deck Stain Calculator Calculate how many gallons of deck stain are needed based on deck area and product coverage. Decking Calculator Calculate the number of deck boards needed based on deck dimensions and board width. Door Header Size Calculator Determine the required header size for a door or window opening in a load-bearing wall. Epoxy Calculator Calculate how much epoxy resin is needed for a countertop, floor, or river table project. Fence Estimate Calculator Estimate the total cost to install a fence based on linear footage, material type, and labor. Fence Material Calculator Calculate the lumber quantities for building a wood privacy fence including posts, rails, and pickets. Fence Picket Calculator Calculate the number of fence pickets needed for a given fence length and picket width. Fence Post Depth Calculator Calculate the required burial depth and total post length for a fence post. Fire Flow Calculator Estimate the required fire flow rate (GPM) for a building based on floor area and construction type. Fire Glass Calculator Calculate how many pounds of fire glass media are needed to fill a fire pit or fireplace burner tray. Floor Joist Calculator Calculate the number of floor joists needed for a room based on spacing and span. French Drain Calculator Calculate gravel volume and perforated pipe length for a French drain installation. Gallons Per Minute Calculator Calculate flow rate in gallons per minute from volume and time, or from pipe diameter and velocity. Gambrel Roof Calculator Calculate gambrel roof area, rafter lengths, and materials for lower and upper roof sections. Gravel Driveway Calculator Calculate the amount of gravel needed for a driveway in tons and cubic yards. Hoop House Calculator Calculate hoop house dimensions: cover area, volume, plastic needed, and hoop spacing. Insulation Calculator Calculate the amount of insulation needed and the required R-value for walls, attic, or floors. Junction Box Sizing Calculator Calculate minimum junction box volume per NEC 314.16(B) based on conductors, devices, and clamps. K Factor Calculator Calculate the K-factor for fire sprinklers (K = Q / √P) or sheet metal bending K-factor. Limestone Calculator Calculate limestone volume and weight needed for a project area. Liters Per Minute Calculator Calculate flow rate in litres per minute from volume and time. Miter Angle Calculator Calculate miter angle for polygon frames, corner joints, and compound miters. Paver Calculator Calculate how many paving stones are needed to cover a patio or walkway. Paver Sand Calculator Calculate the amount of sand needed for a paver base bedding layer. Pea Gravel Calculator Calculate the amount of pea gravel needed by area and depth. Pitch Diameter Calculator Calculate the pitch diameter of gears (by tooth count and diametral pitch) or threaded fasteners. Post Hole Concrete Calculator Calculate concrete needed to fill a post hole (annular cylinder around a post). Privacy Fence Calculator Calculate posts, rails, pickets, and concrete needed for a privacy wood fence. Ramp Slope Calculator Calculate ramp slope, angle, run length, and ADA compliance for wheelchair ramps. Retaining Wall Calculator Estimate number of retaining wall blocks and cap blocks needed. Rip Rap Calculator Calculate volume and weight of rip rap (armor stone) needed for erosion control. River Rock Calculator Calculate volume and weight of river rock needed for landscaping. Rivet Size Calculator Calculate rivet grip length and nominal length for blind (pop) rivets. Rolling Offset Calculator Calculate rolling offset, true offset, and travel length for pipe or conduit routing. Roofing Calculator Calculate total roof area, roofing squares, shingles, and underlayment for a gable roof. Round Pen Calculator Calculate the number of panels, posts, and total circumference needed for a horse round pen. Shiplap Calculator Calculate the number of shiplap boards needed to cover a wall or ceiling. Sonotube Concrete Calculator Calculate the volume of concrete needed to fill a cylindrical sonotube form. Spindle Spacing Calculator Calculate the number of spindles/balusters and exact gap between them to comply with IRC 4-inch rule. Spiral Staircase Calculator Calculate number of steps, rotation per step, and tread width for a spiral staircase. Square Feet to Cubic Yards Convert an area in square feet with a given depth to cubic yards. Stair Carpet Calculator Calculate how much carpet you need to cover a staircase. Stairs Calculator Calculate the number of steps, riser height, and tread depth for a staircase. Stone Calculator Calculate volume and weight of natural stone needed for a project. Taper Calculator Calculate taper per foot, taper angle, and half angle for machined or fabricated tapers. Tariff Cost Calculator Calculate the additional tariff cost on an imported product based on declared value and tariff rate. Thread Calculator Calculate thread dimensions: pitch diameter, minor diameter, and thread depth for UN or metric threads. Thread Pitch Calculator Convert between threads per inch (TPI) and thread pitch (inches or mm). True Position Calculator Calculate GD&T true position tolerance per ASME Y14.5: TP = 2√(Δx² + Δy²). Vertical Curve Calculator Calculate parabolic vertical curve elevations for road design: y = PVC_elev + g₁x + (g₂−g₁)/(2L) × x². Vinyl Fence Calculator Calculate the number of vinyl fence panels, posts, and post caps needed. Vinyl Siding Calculator Calculate vinyl siding squares, J-channel, and trim needed for a house. Wainscoting Calculator Calculate rails, stiles, panels, and moulding needed for wainscoting installation. Welding Calculator Calculate welding heat input and electrode/wire consumption for MIG, TIG, or stick welding. Wood Beam Span Calculator Estimate the maximum safe span for a wood beam based on size, species, and load. Wood Fence Calculator Calculate the total materials needed for a wood privacy fence including posts, rails, and pickets.