Home Improvement & Construction calculators
Concrete, paint, flooring, roofing, drywall, tile, decking and fencing.
83 free tools
Most used
Concrete CalculatorFind cubic yards and bags of concrete for slabs, footings and postsCubic Feet CalculatorTurn length, width and height into cubic feet and other volume unitsCubic Yard CalculatorConvert area and depth into cubic yards for ordering bulk materialsCurtain Size CalculatorWork out curtain rod length, panel width, length and how many panelsDrain Pipe Slope CalculatorFind the total fall for drain, sewer and shower-floor slopesDrywall CalculatorCount drywall sheets, screws, tape and joint compound for a roomFeet and Inches CalculatorAdd, subtract, multiply and divide tape measurements with fractionsFlooring CalculatorWork out square footage, boxes and total cost for a new floorGravel CalculatorEstimate cubic yards and tons of gravel or crushed stone for any areaHome Electrical Load CalculatorEstimate your home’s service load in amps with the NEC optional methodJoist Span CalculatorLook up maximum deck and floor joist spans by size, species and spacingPaint CalculatorFind how many gallons of paint a room needs, minus doors and windowsPlywood Sheet CalculatorCount 4×8 plywood or OSB sheets for walls, floors and roofsPost Hole Concrete CalculatorFind how many bags of concrete you need to set fence or deck postsR-Value CalculatorAdd up wall and roof layer R-values and convert to U-factorRecessed Lighting Layout CalculatorPlan how many recessed lights you need and where to place themRoof Pitch CalculatorConvert rise and run to roof pitch, angle in degrees and slope percentRoofing CalculatorEstimate roof area, squares, shingle bundles and underlayment rollsRug Size CalculatorFind the right rug size for your living room, dining room or bedroomSquare Footage CalculatorMeasure rooms and odd shapes in square feet, square meters and moreStair CalculatorWork out steps, riser height, run and stringer length in secondsTile CalculatorFind how many tiles and boxes to buy for any floor, wall or backsplashWater Heater Size CalculatorSize a tank water heater from your busiest hour of hot water use
More home improvement & construction tools
Asphalt CalculatorEstimate asphalt tons and paving cost for a driveway or parking lotBoard Foot CalculatorConvert lumber dimensions to board feet and price a pile of boardsBrick CalculatorCount the bricks and mortar bags you need for a wallCarpet CalculatorSquare yards and installed carpet cost for up to three roomsCompound Miter CalculatorGet miter and bevel saw settings for crown molding and sloped boxesConcrete Block CalculatorEstimate cinder blocks, mortar and core fill for any block wallConcrete Mix Ratio CalculatorTurn a concrete volume into bags of cement, sand, gravel and waterConcrete Weight CalculatorFind how much a concrete slab, block or cylinder weighsDeck CalculatorEstimate decking boards, joists, screws and material cost for a deckDeck Footing CalculatorSize deck footings from tributary area, deck load and soil bearingDeck Stain CalculatorKnow how many gallons of stain or sealer your deck really needsEgress Window CalculatorCheck net clear opening, width, height, sill and well against IRC egress rulesEven Spacing CalculatorSpace shelves, frames, pickets or holes with perfectly equal gapsFence CalculatorCount posts, rails, pickets and concrete bags for any fence lineFrench Drain CalculatorEstimate gravel, perforated pipe and filter fabric for a drain trenchHome Renovation Budget CalculatorBuild a realistic remodel budget with markup, tax and contingencyInsulation CalculatorFind the depth, bags or batts needed to reach your target R-valueMiter Angle CalculatorGet the miter saw setting for any polygon frame or corner angleMortar CalculatorWork out how many bags of mortar a brick or block wall needsPaver CalculatorPavers, gravel base and bedding sand for a patio or walkwayPicture Hanging Height CalculatorFind exactly where to put the nail so art hangs at eye levelRafter Length CalculatorFind common rafter length, plumb and seat cut angles and rafter countRoom Heat Loss CalculatorEstimate a room’s heat loss in BTU/hr to size a heater or radiatorRoom Lighting Lumens CalculatorFind how many lumens and bulbs a room needs to be properly litRough Opening CalculatorGet rough opening, header and jack stud sizes for doors and windowsSand CalculatorEstimate cubic yards, tons and bags of sand for any area and depthSelf-Leveling Compound CalculatorWork out how many bags of floor leveler you need for a roomSeptic Tank Size CalculatorEstimate minimum septic tank capacity from bedrooms or daily flowSheet Metal Gauge ConverterConvert sheet metal gauge to inches and mm for steel, aluminum and moreShiplap CalculatorCount the shiplap or tongue-and-groove boards and linear feet for a wallSiding CalculatorEstimate siding squares, boxes and cost after doors and windowsSump Pump Size CalculatorSize a sump pump from measured pit inflow and total dynamic headTankless Water Heater Size CalculatorSize a tankless heater from simultaneous flow and temperature riseThinset CalculatorKnow how many bags of thinset mortar your tile job needsWall Framing CalculatorCount studs, plates and header lumber for a framed wallWallpaper CalculatorWork out how many rolls of wallpaper you need, pattern repeat includedAttic Ventilation CalculatorFind net free vent area and how many intake and exhaust vents you needBaluster Spacing CalculatorEvenly space balusters or spindles and stay under the 4-inch ruleBaseboard CalculatorFind linear feet, pieces and cost of baseboard or trim for any roomBoard and Batten CalculatorSpace battens evenly and count every board for your wall or sidingCaulk CalculatorWork out how many tubes of caulk or sealant a joint needsCeiling Fan Size CalculatorPick the right ceiling fan blade span and downrod length for your roomConcrete Steps CalculatorWork out cubic yards and bags of concrete to pour a set of stepsCountertop CalculatorMeasure countertop square footage and cost for L-shapes and islandsCrown Molding CalculatorGet exact miter and bevel angles for crown molding at any cornerCut and Fill CalculatorEstimate earthwork cut, fill and haul volumes from a grid of elevationsEpoxy CalculatorKnow exactly how much resin to mix for a pour, tabletop or floor coatGrout CalculatorFind how many pounds and bags of grout your tile job needsGutter CalculatorPick the right gutter size and downspout count for your roofJoint Compound CalculatorEstimate drywall mud, buckets and tape for your finish levelLadder Angle CalculatorFind the ladder length, safe base distance and angle for any heightNail Size ConverterTurn penny nail sizes into inches, millimeters, gauge and diameterRebar CalculatorCount rebar bars, sticks, weight and cost for a slab gridRetaining Wall CalculatorEstimate blocks, caps, gravel and cost for a segmental retaining wallSpiral Staircase CalculatorSize treads, rise, rotation and headroom for a spiral stairStair Carpet CalculatorFind how much carpet or runner your staircase really needsStucco CalculatorEstimate stucco bags, lath and cost for any wall area and coat thicknessWainscoting CalculatorCount wainscot panels, rails, stiles and trim for any roomWheelchair Ramp CalculatorWork out ADA ramp length, slope and landings from the riseWood Weight CalculatorWeigh lumber or logs by species, size and moisture content