122 FREE TOOLS
Construction Calculators
Choose a project or search by material. Every tool works in metric and imperial measurements.
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Concrete
Slabs, footings, columns, walls and concrete bags.
Concrete CalculatorEstimate concrete volume, weight, bags and project cost for a rectangular pour. › Concrete Slab CalculatorCalculate concrete for floors, patios, driveways and foundation slabs. › Concrete Footing CalculatorEstimate concrete required for continuous strip footings. › Concrete Column CalculatorCalculate concrete volume for round columns and piers. › Concrete Wall CalculatorEstimate concrete for retaining and structural walls. › Concrete Bag CalculatorConvert concrete volume into 40, 50, 60, 80 or 90 lb bags using published product yields. › Concrete Block Fill CalculatorEstimate grout or concrete needed to fill masonry blocks. › Rebar CalculatorEstimate reinforcement bars, total length and approximate weight. › Block Mortar CalculatorEstimate mortar volume from block count and mortar use per block. › Concrete Mix CalculatorSplit concrete volume into cement, sand and aggregate by mix ratio. › Concrete Reinforcing Mesh CalculatorEstimate reinforcing mesh sheets for a concrete area. › Concrete Steps CalculatorEstimate solid concrete stair volume using step geometry. › Concrete Weight CalculatorEstimate concrete mass from volume and density. › Rebar Weight and Size CalculatorEstimate reinforcement mass from diameter, length and quantity. ›
Area & Volume
Square footage, volume and unit conversions.
Square Footage CalculatorCalculate floor, wall or land area from length and width. › Area CalculatorFind rectangular surface area in metric or imperial units. › Volume CalculatorCalculate three-dimensional volume for construction projects. › Cubic Yard CalculatorEstimate cubic yards of material for concrete, soil or gravel. › Cubic Feet CalculatorCalculate cubic feet from three dimensions. › Slope CalculatorCalculate rise, run, slope percentage and angle. › Cubic Inches CalculatorCalculate rectangular volume in cubic inches. › Cubic Meters CalculatorCalculate rectangular volume in cubic metres. › Cubic Yards to Tons CalculatorConvert material volume to weight using entered bulk density. › Cylinder Cubic Footage CalculatorCalculate cylinder volume in cubic feet. › Cylinder Cubic Yardage CalculatorCalculate cylinder volume in cubic yards. › Feet and Inches Length CalculatorCombine a main length and an additional inch or millimetre amount. › Inch Fraction CalculatorRound a decimal measurement to a practical inch fraction. › Scale Conversion CalculatorConvert a drawing measurement using a 1:n scale. › Square Feet to Cubic Feet CalculatorConvert area and depth into cubic feet. › Square Feet to Cubic Yards CalculatorConvert area and depth into cubic yards. › Square Inches CalculatorCalculate rectangular area in square inches. › Square Meters CalculatorCalculate rectangular area in square metres. › Square Yards CalculatorCalculate rectangular area in square yards. ›
Roofing
Roof area, pitch, shingles, metal panels and gutters.
Roofing CalculatorEstimate roof surface area including pitch and waste. › Roof Pitch CalculatorCalculate roof pitch, angle and slope from rise and run. › Roof Shingle CalculatorEstimate bundles of shingles needed for a roof. › Metal Roof CalculatorEstimate metal roofing panels, rows and waste. › Gutter CalculatorEstimate gutter length, outlets and downpipes. › Roof Truss CalculatorEstimate roof truss count from building length and spacing. › Ice & Water Shield CalculatorEstimate membrane rolls for eaves and valleys. › Plywood Sheathing CalculatorEstimate roof sheathing sheets from roof area. › Roof Snow Load CalculatorEstimate total snow mass from roof area and design area load. › Roofing Material CalculatorEstimate roofing packages after pitch and waste allowance. ›
Flooring
Tile, laminate, hardwood, carpet and screed.
Grout CalculatorEstimate tile grout mass and packages from tile size, joint width, filled depth and product consumption factor. › Self-Leveling Compound CalculatorEstimate self-leveling underlayment bags from floor area, average depth and manufacturer coverage at a reference thickness. › Tile CalculatorEstimate tiles, boxes and waste for floors and walls. › Flooring CalculatorCalculate flooring quantity and packs including waste. › Laminate Flooring CalculatorEstimate laminate packs and total covered area. › Carpet CalculatorCalculate carpet area and allowance for room layouts. › Floor Screed CalculatorEstimate screed volume, dry mix and material weight. › Linear Feet to Square Feet CalculatorConvert a linear run and material width into covered area. ›
Walls
Brick, block, drywall, paint, plaster and insulation.
Sealant and Caulk CalculatorCalculate sealant cartridges and caulk coverage from joint length, width, depth and bead profile. › Brick CalculatorEstimate bricks and mortar for a wall. › Block Wall CalculatorEstimate concrete blocks required for a wall. › Drywall CalculatorCalculate drywall sheets, screws and joint compound. › Paint CalculatorEstimate paint litres from wall area, coats and coverage. › Plaster CalculatorEstimate plaster volume and dry material weight. › Insulation CalculatorEstimate insulation rolls or boards for a surface. › Wallpaper CalculatorEstimate wallpaper rolls from net wall area. ›
Garden & Outdoor
Gravel, mulch, soil, paving, fencing and pools.
Gravel CalculatorEstimate gravel volume, weight and cost. › Mulch CalculatorCalculate mulch needed for beds and landscaped areas. › Topsoil CalculatorEstimate topsoil volume and weight. › Paver CalculatorEstimate paving stones and waste for patios or paths. › Fence CalculatorCalculate fence panels, posts and total length. › Pool Volume CalculatorCalculate rectangular pool volume and water capacity. › Fence Stain CalculatorEstimate stain for one or both faces of a fence. › Post Hole Concrete CalculatorEstimate concrete for cylindrical post holes. › Vinyl Fence CalculatorEstimate vinyl fence panels and posts. › Acreage CalculatorCalculate land area and display the result in acres. › Elevation Grade CalculatorCalculate grade percentage and angle from elevation change. › Grass Seed CalculatorEstimate grass seed mass from lawn area and application rate. › Lawn Mowing CalculatorEstimate mowing time from area, speed, cutting width and efficiency. › Plant and Flower CalculatorEstimate plant quantity from bed area and on-center spacing. › Retaining Wall CalculatorEstimate modular retaining-wall blocks from wall dimensions. › River Rock CalculatorEstimate river-rock volume and mass. › Sand CalculatorEstimate sand volume and mass for a project. › Sod CalculatorEstimate sod rolls from lawn dimensions and roll coverage. › Sod Weight CalculatorEstimate sod delivery weight from area and unit mass. › Soil CalculatorEstimate soil volume and delivered weight. › Stone CalculatorEstimate crushed or landscape-stone volume and mass. ›
Carpentry
Lumber, board feet, stairs, decking and framing.
Board Foot CalculatorCalculate lumber volume in board feet. › Lumber CalculatorEstimate boards or joists from length and spacing. › Decking CalculatorEstimate deck boards, rows and fasteners. › Stair CalculatorCalculate risers, treads and comfortable stair dimensions. › Wall Stud CalculatorEstimate wall studs from wall length and spacing. › Board and Batten Layout CalculatorLay out evenly spaced battens across a wall. › Cabinet Door CalculatorCalculate cabinet door face area for panels and finishes. › Check Square CalculatorCheck a rectangular layout using its theoretical diagonal. › Framing CalculatorEstimate framing members from wall length and spacing. › Lumber Weight CalculatorEstimate timber weight from dimensions, quantity and density. › Plywood CalculatorEstimate full plywood sheets needed for a surface. › Rafter Length CalculatorCalculate rafter length and angle from rise and horizontal run. › Trim and Molding CalculatorConvert required trim run into purchasable stock lengths. › Wainscoting Layout CalculatorEstimate panel stiles from wall length and target spacing. ›
Deck & Patio
Deck boards, balusters, pavers, base and finishing materials.
Baluster CalculatorEstimate baluster count while respecting the selected maximum gap. › Deck Stain CalculatorEstimate stain from deck area, coats and product coverage. › Paver Base CalculatorCalculate compacted aggregate base volume below a patio. › Polymeric Sand CalculatorEstimate joint-sand volume from paved area, joint share and depth. ›
Driveways
Asphalt, concrete, gravel and surface sealer estimates.
Asphalt CalculatorEstimate asphalt volume and weight for paving. › Asphalt Sealer CalculatorEstimate driveway sealer from area, coats and coverage. › Concrete Driveway CalculatorEstimate concrete required for a driveway slab. › Gravel Driveway CalculatorEstimate compacted gravel volume and delivered weight. ›
Siding
Board and batten, clapboard and vinyl siding materials.
Board and Batten Siding CalculatorEstimate board-and-batten siding packages from net wall area. › Clapboard and Lap Siding CalculatorEstimate lap siding packages from net wall area. › Siding Material CalculatorEstimate siding cartons after openings and waste. › Vinyl Siding CalculatorEstimate vinyl siding cartons for exterior walls. ›
Electrical
Voltage drop, wire load and lighting estimates.
Plumbing
Pipe volume, water tanks and drainage slope.
Pipe Volume CalculatorCalculate liquid volume inside a pipe. › Water Tank CalculatorEstimate rectangular tank capacity. › Drainage Slope CalculatorCalculate drain fall, slope percentage and grade. › Flow Rate CalculatorCalculate pipe flow from internal diameter and fluid velocity. › Water Velocity CalculatorCalculate water velocity from flow rate and pipe diameter. ›
Energy & HVAC
Heating, cooling, solar and insulation estimates.
Heating & Cooling BTU CalculatorEstimate room heating or cooling capacity. › Solar Panel CalculatorEstimate panel count and nominal solar capacity from usable roof area. › Heat Loss CalculatorEstimate basic transmission heat loss through a building surface. › Air Conditioner Size CalculatorEstimate a starting air-conditioner capacity by room size. › CFM CalculatorEstimate ventilation airflow from room volume and air changes. › Furnace BTU CalculatorEstimate preliminary furnace output from room volume. › Refrigerant Line Charge CalculatorEstimate additional refrigerant for line length beyond the included allowance. › Window Air Conditioner Size CalculatorEstimate a starting window AC capacity from room dimensions. ›