Home & DIY calculators

164 free home & diy tools, each with the formula and step-by-step working.

• Accent Wall CalculatorBoard spacing, board count and cost for a slat wall.
• Air Conditioner Size CalculatorBTU capacity for a room.
• Aquarium Volume CalculatorGallons in a rectangular fish tank.
• Artificial Turf Cost CalculatorRolls, base, infill and installed cost for fake grass.
• Asphalt CalculatorTons of asphalt for a driveway.
• Attic Ventilation CalculatorNet free vent area, intake and exhaust split for any attic.
• Backsplash Tile CalculatorTile and grout for a kitchen backsplash.
• Baseboard CalculatorLinear feet of trim for a room.
• Baseboard Heater BTU CalculatorBTU and length of electric baseboard heater needed.
• Batt Insulation R-Value CalculatorTotal R-value from stacked insulation layers.
• Blown-In Insulation CalculatorBags of blown-in attic insulation needed.
• Brick Mortar CalculatorBricks, mortar bags and sand for a wall of any size.
• Brick Veneer CalculatorThin brick veneer needed for a wall.
• BTU CalculatorHeating and cooling capacity a room needs.
• Cabinet Refacing Cost CalculatorEstimated cost to reface kitchen cabinets.
• Carpet CalculatorSquare yards of carpet and cost.
• Carpet Padding CalculatorCarpet, padding and tack strip for a room, with cost.
• Chain Link Fence CalculatorFabric, posts and rail needed for chain link.
• Chicken Coop Size CalculatorRecommended coop and run size for your flock.
• Chimney Flue Size CalculatorFlue area needed for a fireplace or stove opening.
• Christmas Lights CalculatorStrands of lights needed for a tree, house or roofline.
• Cinder Block CalculatorBlocks, mortar and cost for any CMU wall, including waste allowance.
• Closet Shelving CalculatorShelving and rod length for a closet layout.
• Composite Decking CalculatorComposite deck boards and clips needed.
• Compost Bin Size CalculatorRecommended compost bin volume for your household.
• Concrete Block CalculatorCMU blocks and mortar bags for a wall.
• Concrete CalculatorCubic yards and bags for slabs, footings and posts.
• Concrete Driveway Cost CalculatorConcrete volume and estimated cost for a driveway.
• Concrete Footing CalculatorConcrete volume for strip or column footings.
• Concrete Slab Cost CalculatorYards, bags, rebar and total cost for a concrete slab.
• Copper Pipe Size CalculatorCopper pipe size for water flow demand.
• Countertop Square Footage CalculatorCountertop area and slab count for a kitchen.
• Crawl Space Encapsulation Cost CalculatorVapour barrier, insulation and dehumidifier pricing.
• Crown Molding CalculatorLinear feet, sticks and mitre angles for crown moulding.
• Crown Molding Miter CalculatorMiter and bevel angles for crown molding corners.
• Crusher Run CalculatorTons and yards of crusher run for a driveway or pad.
• Curtain Fabric CalculatorFabric yardage needed for curtains.
• Deck Board CalculatorBoards, screws, joists and cost for a deck of any size.
• Deck CalculatorBoards, joists and cost for a deck.
• Deck Railing CalculatorRailing posts, balusters and rail length.
• Deck Stain CalculatorGallons of stain for deck boards, rails and stairs.
• Dehumidifier Size CalculatorPint capacity for your room size and dampness level.
• Door Rough Opening CalculatorRough opening size and header length for any door.
• Downspout CalculatorHow many downspouts a roof needs and where to put them.
• Driveway Gravel CalculatorTons and yards of gravel for a driveway, with cost.
• Driveway Sealer CalculatorBuckets of sealer for an asphalt driveway, with coats.
• Drywall CalculatorSheets, screws and compound needed.
• Drywall Mud CalculatorJoint compound needed for drywall seams.
• Drywall Screw CalculatorNumber of screws needed for drywall sheets.
• Electric Heater Running Cost CalculatorHourly and monthly cost to run an electric heater.
• Electricity Cost CalculatorWhat any appliance costs to run per day, month and year.
• Epoxy Flooring Cost CalculatorKits, coverage and total cost for an epoxy garage floor.
• Exterior Paint CalculatorGallons of paint for a house exterior.
• Fence CalculatorPosts, rails and pickets needed.
• Fence Post Concrete CalculatorBags of concrete per post hole, plus totals for the whole fence.
• Fertilizer CalculatorPounds of fertiliser for a target nitrogen rate and NPK.
• Fiber Cement Siding CalculatorFiber cement planks needed for siding.
• Firewood Cord CalculatorCords in a stack and cost per cord.
• Firewood Cord CalculatorConvert a stack of firewood into cords, face cords and cost.
• Firewood Stack CalculatorCords of firewood in a stacked pile.
• Flat Roof Replacement Cost CalculatorTPO, EPDM or modified bitumen replacement cost.
• Floating Floor Underlayment CalculatorRolls of underlayment for a floating floor.
• Flooring CalculatorBoxes of flooring and cost.
• French Drain CalculatorWork out gravel, pipe, fabric and fall for a French drain trench.
• Gambrel Roof CalculatorRafter lengths, angles and area for a barn-style roof.
• Garage Door Torsion Spring CalculatorWire size, IPPT and turns for a replacement spring.
• Garage Shelving CalculatorShelving units needed to cover a garage wall.
• Garden Soil CalculatorCubic yards of soil or compost for a bed.
• Gas Fireplace Running Cost CalculatorHourly and monthly cost to run a gas fireplace.
• Generator Size CalculatorWatts needed to run your home.
• Grass Seed CalculatorPounds of seed for new lawns and overseeding, by grass type.
• Gravel CalculatorTons and cubic yards of gravel for any area.
• Grout CalculatorPounds of grout for any tile size, joint width and area.
• Gutter Downspout CalculatorNumber of downspouts needed for roof area.
• Gutter Length CalculatorFeet of gutter and downspouts needed for a roof.
• Gutter Replacement Cost CalculatorCost to replace gutters by material, length and downspouts.
• Gutter Size CalculatorPick 5 in or 6 in gutters from roof area, pitch and rainfall.
• Handrail Length CalculatorHandrail length, angle and baluster count for a staircase.
• Hardwood Flooring CalculatorSquare footage, boxes and cost for solid or engineered wood.
• Home Renovation Budget CalculatorBudget a renovation by area with a contingency.
• Hot Tub Operating Cost CalculatorMonthly electricity cost to run a hot tub.
• Insulation CalculatorBatts or rolls needed by R-value.
• Joist Span CalculatorCheck the maximum floor joist span for a given size, spacing and load.
• Ladder Angle CalculatorSafe base distance for a ladder using the 4-to-1 rule.
• Laminate Flooring CalculatorPacks, underlay and trim for a laminate or LVP floor.
• Landscaping Rock CalculatorTons of decorative rock for a bed.
• Lawn Fertilizer CalculatorHow many pounds of product your lawn needs.
• Lawn Watering CalculatorMinutes per zone and gallons to hit 1 inch of water a week.
• Limestone CalculatorCrushed limestone tonnage for driveways and beds.
• Metal Roofing CalculatorMetal panels and screws for a roof.
• Mini Split Sizing CalculatorBTU size for a ductless mini split from room size and conditions.
• Mortar CalculatorBags of mortar for block or brick.
• Mulch CalculatorBags or yards of mulch for your beds.
• Paint CalculatorGallons needed for walls, doors and windows deducted.
• Paint Primer CalculatorGallons of primer for walls or ceilings.
• Paver Patio CalculatorPavers, base and edging for a patio.
• Paver Sand CalculatorBedding and joint sand for pavers.
• Peel-and-Stick Wallpaper CalculatorRolls of removable wallpaper needed.
• Pergola Material CalculatorPosts, beams, rafters and slats for a pergola build.
• PEX Pipe Size CalculatorPEX pipe size for fixture flow demand.
• Picket Fence CalculatorPickets, rails and posts for a picket fence.
• Pine Straw CalculatorBales of pine straw for any bed size and depth.
• Plywood Sheet CalculatorHow many 4x8 sheets you need for any area, with cost.
• Pool Chlorine CalculatorDose liquid chlorine, tablets or shock for your pool volume.
• Pool Heating Cost CalculatorMonthly cost to heat a swimming pool.
• Pool Volume CalculatorGallons in a pool, plus chlorine dosing.
• R-Value CalculatorTotal assembly R-value and U-factor from your layers.
• Radiator BTU CalculatorBTU or watt output needed to heat a room.
• Rafter Angle CalculatorPitch to degrees, plumb cut and birdsmouth seat cut angles.
• Rafter Length CalculatorCommon, hip and valley rafter length from span, pitch and overhang.
• Rain Barrel Size CalculatorRainwater collected from your roof for barrel sizing.
• Rainwater Harvesting CalculatorWater you can collect from your roof.
• Raised Bed Soil CalculatorSoil mix volume and blend ratios for raised garden beds.
• Raised Garden Bed Soil CalculatorCubic feet and bags of soil for a raised garden bed.
• Ramp Slope CalculatorRamp length, slope ratio and landings for ADA compliance.
• Rebar CalculatorRebar length and tie count for a slab.
• Retaining Wall Block CalculatorCount blocks, caps, base gravel and backfill for a retaining wall.
• Retaining Wall Cap CalculatorCap blocks and adhesive for a wall top.
• Rip Rap CalculatorTonnage of rip rap for slopes and shorelines.
• Roof Pitch CalculatorPitch, angle, rafter length and roof area.
• Roof Shingle CalculatorSquares, bundles, nails and underlayment for a shingle roof.
• Roof Underlayment CalculatorRolls of roofing underlayment needed.
• Seed Spacing CalculatorPlants per row and per bed from your spacing plan.
• Septic Drain Field CalculatorDrain field area and trench length from soil type and bedrooms.
• Septic Tank Size CalculatorTank capacity for your household.
• Shed Foundation CalculatorGravel pad, blocks or slab volume for a shed base.
• Siding CalculatorSquares and boxes of siding from wall area minus openings.
• Sod CalculatorRolls or pallets of turf needed.
• Sod Pallet CalculatorPallets and rolls of sod for a lawn, with delivery cost.
• Soffit CalculatorSoffit panels, fascia and vent area for your eaves.
• Soil Volume CalculatorCubic yards, bags and weight of soil for any area and depth.
• Solar Panel CalculatorSystem size, panel count and payback period.
• Solar Panel Payback CalculatorYears to break even on a home solar installation.
• Spiral Staircase CalculatorTreads and rotation for a spiral stair.
• Spray Foam Insulation Cost CalculatorBoard feet, sets and installed cost for open or closed cell.
• Sprinkler Zone CalculatorHow many heads per zone from available GPM and head flow.
• Square Footage CalculatorRoom area for flooring, paint and materials.
• Stair Riser & Tread CalculatorComfortable riser/tread ratio checker.
• Stair Runner Length CalculatorRunner length for straight stairs, winders, mid-landings and half-landings.
• Stair Stringer CalculatorRise, run and stringer length for stairs.
• Stud Count CalculatorStuds, plates and nails for a framed wall of any length.
• Subway Tile CalculatorSubway tiles needed for a wall or backsplash.
• Sunroom Cost CalculatorThree-season or four-season sunroom build cost.
• Tile CalculatorTile count, boxes and grout for any surface.
• Tile Grout Sealer CalculatorGrout sealer needed for tiled floor or wall.
• Tile Layout CalculatorFull and cut tiles across a room.
• Tile Spacer CalculatorNumber of tile spacers needed.
• Tons to Cubic Yards CalculatorConvert tons of gravel, sand or soil to cubic yards.
• Topsoil Bag CalculatorBags versus bulk topsoil for your area and depth.
• Topsoil CalculatorCubic yards and tons of topsoil.
• Tree Spacing CalculatorTrees per acre for square, rectangular or triangular layouts.
• Underfloor Heating CalculatorCable/mat length and running cost for radiant floor heat.
• Vinyl Fence Cost CalculatorPanels, posts and total cost for a vinyl fence run.
• Vinyl Plank Flooring CalculatorBoxes of LVP needed with waste.
• Vinyl Siding CalculatorSquares of vinyl siding for a house.
• Wallpaper CalculatorRolls needed, allowing for pattern repeat.
• Water Heater Size CalculatorTank or tankless size for your home.
• Well Pump Size CalculatorGPM and total dynamic head for sizing a well pump.
• Wheelchair Ramp Length CalculatorRamp length from rise using ADA slope ratios.
• Window Blinds Size CalculatorBlind width and length for inside or outside mount.
• Window Replacement Cost CalculatorTotal cost to replace windows, with payback from energy savings.
• Wire Gauge CalculatorCable size for current, length and voltage drop.
• Wood Stove BTU CalculatorBTU output needed to heat a space with a wood stove.
• Yards to Tons CalculatorConvert cubic yards of gravel, sand, topsoil or asphalt to tons.

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