75 tools
Construction & DIY
Concrete, paint, tiles, flooring, slopes, excavation and material quantities for real building jobs.
Tools in this category
- Construction & DIYConcrete Volume CalculatorCubic metres and tonnes of concrete needed for a slab, with a waste allowance.
- Construction & DIYPaint CalculatorLitres of paint needed for a given wall area, number of coats and coverage rate.
- Construction & DIYTile CalculatorHow many tiles you need for an area, with a cutting allowance.
- Construction & DIYSlope and Gradient CalculatorSlope as a percentage, an angle, a ratio and the sloping length.
- Construction & DIYFlooring CalculatorHow many packs of flooring to buy for a room, including waste.
- Construction & DIYRoom Wall Area CalculatorWall area, floor area, perimeter and volume of a rectangular room.
- Construction & DIYGravel and Aggregate CalculatorTonnes and cubic metres of gravel for a given area and depth, with the cost.
- Construction & DIYBrick CalculatorNumber of bricks or blocks for a wall area, counting the mortar joint.
- Construction & DIYRoof Pitch CalculatorRoof angle, pitch percentage, rafter length and roof area per metre of length.
- Construction & DIYDrywall CalculatorSheets, screws, joint tape and compound for a plasterboard job, from the area and the sheet size.
- Construction & DIYExcavation Volume CalculatorTrench volume in place, loose spoil volume after bulking, weight and truck loads.
- Construction & DIYConcrete Mix CalculatorCement bags, sand and gravel for a given volume and mix ratio.
- Construction & DIYStair CalculatorNumber of steps, exact riser height, total run and the Blondel comfort value.
- Construction & DIYLand Plot Area Calculator (four sides)Area of an irregular four-sided plot from its four sides and one diagonal, in square metres, hectares and acres.
- Construction & DIYHeat Loss Through a Wall CalculatorHeat lost through a surface, the daily energy it costs and the price of that energy.
- Construction & DIYSwimming Pool Volume CalculatorPool volume in cubic metres and litres, plus the filtration turnover time.
- Construction & DIYWallpaper CalculatorHow many rolls of wallpaper a room needs, counted in full drops.
- Construction & DIYDrawing Scale ConverterTurn a measurement taken off a scale drawing into the real-world size.
- Construction & DIYPipe Volume and Weight CalculatorLitres per metre, total volume, pipe weight and the weight of what is inside, from the outside diameter and the wall thickness.
- Construction & DIYPlaster and Render CalculatorBags of plaster or render for a wall area at a given thickness.
- Construction & DIYRainwater Harvesting CalculatorRainwater you can collect from a roof in a year, and the average per day.
- Construction & DIYSuspended Ceiling CalculatorPanels, grid runners, edge trim and hangers for a suspended ceiling, from the room size and the panel size.
- Construction & DIYColumn Concrete CalculatorConcrete volume and mass, formwork area, main bars and stirrups for rectangular columns.
- Construction & DIYRoof Tiles CalculatorNumber of tiles for a pitched roof, from the plan dimensions and the pitch angle.
- Construction & DIYU-Value and Insulation CalculatorThermal transmittance and resistance of an insulation layer, from thickness and conductivity.
- Construction & DIYBackfill CalculatorHow much fill a trench needs once the pipe or structure is in, in loose volume, tonnes and truck loads.
- Construction & DIYRebar Weight CalculatorWeight of reinforcement bars from diameter, length and quantity.
- Construction & DIYShelf Sag CalculatorSag of a loaded shelf, its stiffness ratio, the load for a 1:250 limit and the span that would halve the sag.
- Construction & DIYBoard Feet CalculatorBoard feet in a piece of timber, the total for a batch, the volume in cubic metres, cost and rough weight.
- Construction & DIYTile Grout CalculatorKilograms of grout for a tiled area, from tile size, joint width and tile thickness.
- Construction & DIYWaterproofing CalculatorMembrane area, rolls, primer and litres of liquid waterproofing, including the upstand at the walls.
- Construction & DIYDecking Boards CalculatorHow many deck boards a terrace needs, plus total linear metres and joist count.
- Construction & DIYRadiator Output CalculatorThe real heat output of a radiator at your actual flow and return temperatures, against its catalogue rating.
- Construction & DIYRamp Length CalculatorHorizontal run, sloping length and angle of a ramp for a given rise and gradient.
- Construction & DIYWelded Mesh CalculatorSheets, mass per square metre and total weight of reinforcement mesh, with the lap between sheets taken off.
- Construction & DIYWind Load CalculatorDynamic wind pressure and the force on a flat surface, with the overturning moment about its base.
- Construction & DIYDrainage Fall CalculatorTotal fall over a pipe run for a given gradient, in millimetres, percent and mm per metre.
- Construction & DIYUnderfloor Heating Pipe CalculatorMetres of pipe and number of loops for an underfloor heating circuit.
- Construction & DIYAsphalt Tonnage CalculatorTonnes of asphalt to order for a driveway, path or road from its size, compacted thickness and density, with the number of truckloads.
- Construction & DIYFence Posts CalculatorPosts, panels, the exact spacing that results and the concrete needed to set them.
- Construction & DIYGate CalculatorLeaf width, pickets, frame and brace lengths, weight and the load each hinge carries.
- Construction & DIYMulti-Layer Wall R-Value CalculatorTotal thermal resistance and U-value of a three-layer wall, and how much of it the insulation contributes.
- Construction & DIYSkirting Board CalculatorMetres of skirting and number of lengths needed for a room, allowing for doorways.
- Construction & DIYHorizontal Cylindrical Tank Volume CalculatorLitres in a horizontal round tank from the depth of liquid, plus the percentage full.
- Construction & DIYSimply Supported Beam Reactions and Bending Moment CalculatorSupport reactions, maximum bending moment and where it occurs, shear and moment at any point, and the bending stress, for a beam with a point load and a uniform load — with the moment diagram.
- Construction & DIYInsulation Thickness Calculator (for a Target U-Value)How thick a layer of insulation must be to bring an existing wall, roof or floor down to a target U-value.
- Construction & DIYPost Hole Concrete Calculator (Fence and Deck Posts)How much concrete and how many bags you need to set fence, deck or pergola posts, from the hole size, depth and post size.
- Construction & DIYManning Open Channel Flow CalculatorFlow and velocity in a rectangular open channel, with the hydraulic radius and wetted area.
- Construction & DIYWood Movement CalculatorHow much a board changes width as its moisture content changes, with the gap to allow.
- Construction & DIYBridged U-Value Calculator (Timber Stud or Joist Wall, ISO 6946 Combined Method)U-value of a wall, roof or floor where timber studs or joists interrupt the insulation, by the ISO 6946 combined method, with the heat loss the studs add — drawn against the stud share.
- Construction & DIYComposite Wall Sound Insulation Calculator (Wall with Window, Door or Gap)The sound reduction of a wall made of several parts — wall, window, door, vent or open gap — from their areas and their own dB ratings, and which part lets most of the sound through.
- Construction & DIYConcrete Block CalculatorHow many blocks a wall takes, from its area and the block size you are using.
- Construction & DIYFooting Bearing Pressure Calculator (Eccentric Load, Middle Third Rule)Largest and smallest pressure under a rectangular footing carrying a vertical load and a moment, the eccentricity, how much of the base stays in contact, and the area for a pressure you choose.
- Construction & DIYPipe Offset Calculator (Travel, Run and Multiplier for 45° and 30° Bends)The length of the diagonal piece between two bends that moves a pipe or conduit sideways by a given offset, with the run it uses, the take-up and the multiplier — drawn to scale.
- Construction & DIYTruncated Pyramid Volume Calculator (Footings, Hoppers)Volume and weight of a truncated pyramid with rectangular top and bottom — a tapered concrete footing, a hopper or a spoil heap — with the cross-section drawn to scale.
- Construction & DIYStud Wall Calculator (Timber or Metal Framing)Number of studs and length of plates and timber for a framed partition wall in wood or metal profiles, from its length, height and stud spacing.
- Construction & DIYSurface Condensation and Mould Risk CalculatorTemperature of the inside face of a wall, window or corner on a cold day, and whether it will get condensation or mould at the room's humidity.
- Construction & DIYBaluster Spacing Calculator (Balusters, Pickets and Slats)How many balusters a stair or balcony guard needs so no gap exceeds the limit, and the exact gap and centre spacing that results, so they look evenly spaced.
- Construction & DIYConcrete Strength Gain Calculator (Strength at 3, 7, 14 Days by Eurocode 2 or ACI 209)The strength a concrete has reached at a given age as a share of its 28-day value, and how many days it takes to reach a share you choose, such as 70 % for striking formwork.
- Construction & DIYGlass Weight Calculator (Panes and Double Glazing)Weight of a pane or a double-glazing unit from its size and glass thickness, per unit, in total and per square metre.
- Construction & DIYLadder Angle Calculator (1-in-4 Rule)How far to set the foot of a ladder from the wall for the safe 1-in-4 angle, and the ladder length needed to reach a given height.
- Construction & DIYRankine Earth Pressure Calculator (Retaining Wall Thrust)Active and passive earth pressure coefficients and the horizontal thrust on a retaining wall per metre, from the soil's friction angle, unit weight and the wall height.
- Construction & DIYRational Method Runoff Calculator (Peak Flow for Drains and Culverts)Peak stormwater flow from a small catchment — a roof, car park, yard or field — from its runoff coefficient, rainfall intensity and area, in m³/s and L/s.
- Construction & DIYScreed and Self-Levelling Compound Calculator (Bags for a Floor)Kilos and bags of self-levelling compound or screed for a floor, using the average thickness of a layer that is thin at one end and thick at the other.
- Construction & DIYSilicone and Sealant Cartridge Calculator (Caulk for a Joint)How many cartridges of silicone, caulk or sealant a joint takes, from its width, depth and total length, and how many metres one cartridge runs.
- Construction & DIYSnow Load Weight Calculator (Roof)Weight of the snow lying on a roof, per square metre and in total, from the depth of snow and its density.
- Construction & DIYSolar Panel Row Spacing Calculator (Avoid Shading)Distance between rows of tilted solar panels so that one row does not shade the next at noon on the winter solstice, with the ground coverage ratio.
- Construction & DIYSpherical Tank Volume Calculator (Partly Filled)How much liquid a spherical tank holds at a given level, its total capacity and the free space left, with the level-to-volume curve drawn.
- Construction & DIYConcrete Maturity Calculator (Nurse–Saul Equivalent Age)The maturity index and equivalent age of curing concrete from the temperatures it went through, so a cold week can be compared with a warm one.
- Construction & DIYCutting Stock Calculator with Saw Kerf (How Many Pieces per Board)How many pieces of a given length you get from a board, bar or pipe once the width of the saw cut is counted, how many boards to buy, and the waste.
- Construction & DIYMass Law Sound Insulation CalculatorHow much airborne sound a single solid wall or panel blocks at a given frequency, from its mass per square metre, by the mass law.
- Construction & DIYPolygon Frame Miter Angle Calculator (Hexagon, Octagon and Other Frames)The saw angle and the piece lengths for a frame, planter or table top with any number of equal sides, from the width across the flats and the board width.
- Construction & DIYSoil Swell and Shrinkage Calculator (Bank, Loose and Compacted Volume)Convert a volume of soil between in the ground, loose as dug and compacted in a fill, from the swell and shrinkage percentages, and count the truck loads.
- Construction & DIYWindow Overhang Shading Calculator (Eaves, Pergola, Awning Depth)How far an overhang, pergola or awning must project to keep a window or wall in shade at a given sun position, and how deep the shade of your existing one reaches.
- Construction & DIYCable Sag CalculatorSag, end tension and developed length of a cable or wire strung between two supports at the same height.