Construction And DIY Calculators

Work out how many tons of hot mix asphalt a driveway, parking lot or road needs. Enter area, compacted thickness and mix density to get tonnage, cubic yards, truckloads and cost, with a cross-section diagram and waste buffer.

Calculate even baluster spacing for a deck, stair or porch railing so every gap stays under the 4-inch code limit. Get the baluster count, even gap, on-centre spacing and a tape-measure layout list in imperial or metric units.

Work out how much baseboard, crown molding or trim a room needs. Subtract doorways, add a waste factor for miter cuts, and see the linear feet, the number of boards to buy, leftover offcut and total cost with a room blueprint.

Estimate the maximum safe load, bending moment, shear, stress, and deflection of beams. Choose support type, load pattern, cross-section, and material to get a strength and serviceability verdict.

Calculate lumber volume in board feet with 25+ wood species, cost estimation, weight calculations, and 3D visualization. Perfect for woodworkers, contractors, and DIY enthusiasts.

Calculate the recommended tightening torque, clamp-load preload, and yield-margin for a bolt — pick a metric M or imperial UN size, ISO/SAE grade, and lubrication, and compare both the short-form K-factor and the VDI 2230 detailed method.

Calculate how many bricks and how much mortar you need for your wall project. Supports doors/windows, multiple brick sizes, bond patterns, and cost estimation.

Work out carpet square footage, estimate material and installation costs, plan the roll layout with seam placement and allow for waste. Supports rectangular, L-shaped and multi-room layouts with padding and a cost breakdown.

Find the right ceiling fan blade span and downrod length for your room. Enter the room dimensions and ceiling height to get a fan diameter, downrod size, mounting type and safe hanging height on a to-scale side-view diagram.

Calculate concrete volume in cubic yards, meters, and feet for slabs, footings, columns, and stairs. Get pre-mix bag counts, ready-mix estimates, material costs, and professional tips for your project.

Find out whether your couch fits through a doorway before moving day. Checks the sofa upright and on its side, shows the clearance to spare, tells you if removing the legs rescues a tight fit, and compares the diagonals.

Calculate cubic yards for concrete, gravel, mulch, topsoil and sand. Enter length, width and depth in feet, inches, yards or metres to get the yards to order plus weight in tons, dump-truck loads, bags and a waste buffer.

Work out the curtain panel width and length you need from your window measurements, fullness ratio and where the curtains should fall. See a to-scale diagram plus the ready-made size to buy and the cut dimensions for sewing.

Estimate how many gallons of deck stain the boards, railings and stairs need. Adjusts coverage for stain type, wood surface and number of coats, then tells you how many cans to buy, the leftover and the estimated cost.

Calculate all materials needed for your deck project including decking boards, joists, beams, posts, and fasteners. Features interactive SVG diagram, waste allowance, and support for both imperial and metric units.

Find the right dehumidifier pint capacity for a room, basement or whole house. Describe the dampness in plain language and get a capacity on both the 2019 DOE scale and the old scale, with target humidity and daily water removal.

Calculate the number of drywall sheets needed for walls and ceilings, plus estimates for joint compound, tape, and screws. Supports imperial and metric units with multiple sheet sizes and customizable waste allowance.

Work out how much epoxy resin river tables, deep pours, flood coats and round moulds need. Get mixed volume in gallons and litres, the resin-to-hardener split for any ratio, mixed weight, coverage area and an optional cost estimate.

Calculate fence materials including posts, rails, pickets, panels, concrete, and hardware with visual diagrams. Supports privacy, picket, post & rail, and panel fence styles.

Measure a firewood stack and see how many full cords and face cords it holds, the total volume, and - if you enter what you paid - the real cost per cord with a fair-price verdict, plus estimated delivery weight by wood type.

Calculate flooring material needed for any room with our free flooring calculator. Supports hardwood, laminate, vinyl, tile, and carpet. Get box/roll counts, cost estimates, waste allowance, and multi-room totals with visual diagrams.

Work out how much grass seed your lawn needs by area, grass type and whether you are starting fresh or overseeding. Get pounds of seed, bags, seeding rate, leftover and an optional cost, with a new-lawn versus overseeding comparison.

Plan a landscape job fast: pick rectangle, circle, triangle or ring beds, set the depth, choose gravel, sand, topsoil, mulch, compost or fill dirt, and get volume, weight, bags, truck loads and cost with compaction and waste factored in.

Calculate the BTU and tonnage needed to heat or cool any room or building. Factors in room dimensions, insulation quality, climate zone, sun exposure, windows, occupancy, and appliances for accurate HVAC load estimation.

Calculate recommended R-values, insulation thickness, material quantity, and estimated costs based on your climate zone, building component, and insulation type.

Calculate board feet from lumber dimensions, estimate how many boards a project needs, and get the total cost with a waste factor. Supports standard and custom sizes, several wood species and templates for decks, fences and framing.

Calculate the precise miter and bevel angles for cutting trim, baseboard, crown molding, and picture frames at any corner angle. Includes interactive angle diagram, step-by-step formulas, saw setup instructions, and common reference angles.

Calculate how much mulch, topsoil, gravel, or sand you need for your landscaping project. Get accurate volume in cubic yards/meters, weight estimates, bag counts, and delivery truck loads with interactive 3D visualization.

Work out how much paint a room needs with smart coverage estimation. Covers walls, ceiling and trim with automatic door and window deductions, several coats, texture adjustments and a shopping list across different can sizes.

Calculate exactly how many pavers, how much bedding sand, joint sand, and gravel base material you need for your patio, walkway, or driveway. Supports multiple paver sizes and laying patterns with a printable shopping list.

Find exactly where the nail or hook goes to hang a picture at the gallery-standard 57-inch centre height. Enter frame height and wire drop for the hook height from the floor, plus centring for one or two hooks and an above-furniture mode.

Calculate flow rate, velocity, Reynolds number, head loss, and pressure drop for fluids in pipes. Compare Hazen-Williams and Darcy-Weisbach + Colebrook-White results side-by-side, with PVC, copper, steel, cast iron, and HDPE pipe presets.

Calculate pond volume in gallons and litres and the exact flexible liner sheet size you need, including wall drape and edge overlap. Supports rectangular, circular and oval ponds, with pump flow rate and safe fish stocking estimates.

Work out how much salt to add to a saltwater pool to hit a target salinity for your chlorine generator. Enter pool volume, current level and target ppm for the weight and number of bags - or how much water to drain if over-salted.

Calculate the number of rebar bars, total linear footage, weight and estimated cost for a concrete slab. Supports sizes #3 through #10 with presets for driveways, patios and foundations, plus a visual grid layout diagram.

Calculate the number of blocks, gravel, drainage aggregate, geogrid, and total materials needed for your retaining wall project. Get a detailed material list with cost estimates.

Calculate roof pitch (slope), angle in degrees, and rafter length from rise and run or span. Interactive visual diagram, multiple calculation modes, and professional results for roofing, carpentry, and construction projects.

Calculate roofing materials for your project - shingles, metal sheets, tiles or underlayment. Includes a roof pitch calculator, waste factor adjustment, visual roof diagrams and material quantity estimates with worked steps.

Find the right rug size for a living room, dining room or bedroom using proven layout rules. Enter your room and furniture, and get an ideal size snapped to a rug you can actually buy, drawn on a to-scale top-down floor plan.

Estimate how much siding you need in squares from your exterior wall area minus windows and doors. Add gable ends, choose a siding type and waste factor, and get boxes or panels, total cost and a house elevation diagram.

Calculate slope as a percentage, ratio or angle from rise and run, or work back to a missing dimension from a known slope. Includes ADA compliance checking, a steepness gauge and advice for ramps, drainage, driveways and roofing.

Calculate how much sod your lawn needs in slabs, rolls or pallets. Enter the lawn as a rectangle, circle, triangle or L-shape, add a waste allowance for cuts and edges, and get a to-scale diagram and an optional cost estimate.

Calculate square footage for rectangles, triangles, circles, trapezoids, L-shapes, and custom multi-room layouts. Includes material estimator for paint, flooring, and tile, plus cost calculator and common room size references.

Use the 3-4-5 rule (Pythagorean theorem) to verify if a corner is perfectly square (90 degrees) for foundations, framing, and layout work with instant accuracy feedback and visual diagrams.

Calculate stair dimensions including the number of steps, rise, run, stringer length and angle, and check compliance with IRC building code standards. Supports US Customary and metric units with automatic or manual step counts.

Estimate the weight of steel bars, plates, pipes, tubes and angles from their dimensions and density. Pick a shape, enter the sizes and choose a material to get per-piece and total weight, volume, surface area and cost.

Calculate the number of studs, plates and lumber a wall framing project needs. Includes interactive wall diagrams, support for door and window openings, cost estimation and framing tips for 16 or 24 inch on-centre spacing.

Calculate exactly how many tiles you need for floors or walls. Get complete material estimates including grout, adhesive, and cost calculations.

Work out how much grout a tiling job needs. Enter tile size, joint width and depth and the total area to get grout volume, weight in kilograms and pounds, bags to buy and coverage per square metre, for sanded, unsanded or epoxy grout.

Find the ideal height to mount your TV from the screen size and your seated eye level. Gives the floor-to-centre, floor-to-bottom and floor-to-top heights, checks the viewing angle for neck comfort, and recommends a downward tilt.

Calculate how many wallpaper rolls you need for any room. Our calculator considers wall dimensions, pattern repeat, doors and windows, and waste allowance for accurate material estimates that help you save money and avoid running short.

Find the right water heater size for your household. Tank mode sizes it in gallons from peak-hour demand using the DOE first-hour-rating method, while tankless mode gives the GPM flow rate for your temperature rise plus BTU/hr and kW.