112 free calculators for the questions that come up on a job: how many yards to order, how many bags to buy, how many steps to cut. Every page shows its formula, a worked example and the sources behind its numbers.
Free calculators for concrete, landscaping and home projects
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Popular calculators
- Square Footage CalculatorSquare feet of rooms, homes and lots, with cost.
- Cubic Yard CalculatorCubic yards from any dimensions, with tons.
- Gravel CalculatorYards and tons of gravel for driveways, paths and bases.
- Concrete CalculatorCubic yards and bags for slabs, footings, walls and columns.
- Asphalt CalculatorTons of asphalt for driveways and lots.
- Dirt CalculatorFill dirt in cubic yards and tons, with settling allowance.
- Topsoil CalculatorYards, bags and tons of topsoil for lawns and beds.
- Stair CalculatorRisers, treads, run and stringer length with code checks.
Concrete & Masonry
See all- Concrete CalculatorCubic yards and bags for slabs, footings, walls and columns.
- Concrete Bag CalculatorBags, total weight, mixing water and cost by bag size.
- Concrete Block CalculatorBlocks per wall, courses and 80 lb mortar bags.
- Brick CalculatorBricks for a wall or veneer, by brick size and mortar joint.
- Mortar CalculatorBags of mortar mix for a block or brick wall, plus sand.
- Epoxy CalculatorGallons of epoxy for a floor coating or a resin pour.
- Post Hole Concrete CalculatorBags of concrete to set fence, deck or mailbox posts.
- Rebar CalculatorRebar for a slab grid: bars each way, linear feet, sticks and weight.
- Concrete Weight CalculatorWeight of a concrete slab, block or volume in pounds, tons and kilograms.
- Sonotube CalculatorConcrete for round tube forms: cubic feet, yards and bags per pier.
- Concrete Steps CalculatorConcrete for solid poured steps, with an optional top landing.
- Self-Leveling Concrete CalculatorBags of self-leveling underlayment for a floor, by average depth.
- Stucco CalculatorBags of base-coat stucco for a wall, by coat thickness.
- Stone Veneer CalculatorSquare feet of flat stone veneer and linear feet of corners for a wall.
- Block Fill CalculatorCore-fill grout or concrete to fill cinder block cores, in bags and cubic yards.
- Concrete Footing CalculatorCubic yards and bags of concrete for strip footings and pad footings.
- Deck Footing CalculatorDeck footing diameter from the load it carries and the soil, plus concrete and bags.
Landscaping & Paving
See all- Gravel CalculatorYards and tons of gravel for driveways, paths and bases.
- Sand CalculatorYards, tons and bags of sand for pavers and sandboxes.
- Dirt CalculatorFill dirt in cubic yards and tons, with settling allowance.
- Topsoil CalculatorYards, bags and tons of topsoil for lawns and beds.
- Mulch CalculatorYards of mulch or number of bags for garden beds.
- Asphalt CalculatorTons of asphalt for driveways and lots.
- Pea Gravel CalculatorYards and tons of pea gravel for paths, patios and play areas.
- River Rock CalculatorYards and tons of river rock for beds, dry creeks and drainage.
- Rock CalculatorYards, tons and bags of river rock, crushed rock or lava rock.
- Rip Rap CalculatorTons of rip rap for a bank, ditch or shoreline, by stone class.
- Crushed Stone CalculatorYards and tons of crushed stone for driveways, bases and drainage.
- Crusher Run CalculatorTons and loose yards of crusher run for a compacted base.
- Paver Base CalculatorBase rock and bedding sand for a paver patio, walk or driveway.
- Decomposed Granite CalculatorYards and tons of decomposed granite for paths and patios.
- Raised Bed Soil CalculatorCubic yards and bags of soil to fill a raised garden bed.
- Sod CalculatorSquare feet, square yards and pallets of sod for a new lawn.
- Grass Seed CalculatorPounds and bags of grass seed for a new lawn or overseeding.
- Pond Liner CalculatorLiner size for a garden pond, with overlap and volume.
- Fence CalculatorPosts, rails and pickets for a wood picket or privacy fence.
- Paver CalculatorPavers, base gravel and bedding sand for a patio, walkway or driveway.
- Retaining Wall CalculatorBlocks, caps, base gravel and drainage stone for a block retaining wall.
- Polymeric Sand CalculatorBags of polymeric sand for paver joints, by joint width.
- Flagstone CalculatorTons of flagstone for a patio or path, from your stone's coverage per ton.
- Compost CalculatorCubic yards and bags of compost for topdressing a lawn or amending beds.
- Lime CalculatorPounds and bags of lawn lime from your soil test rate and lawn area.
- French Drain CalculatorGravel, perforated pipe and filter fabric for a French drain trench.
- Artificial Turf CalculatorSquare feet of artificial grass to order off the roll, with seams.
- Landscape Fabric CalculatorRolls of landscape or weed barrier fabric, with overlap between strips.
- Sandbag CalculatorSandbags for a flood barrier by length and height, from US Army Corps of Engineers figures.
- Pine Straw CalculatorBales of pine straw for beds and borders, by depth and bale coverage.
- Rubber Mulch CalculatorBags, cubic yards and tons of rubber mulch for beds and playgrounds.
- Sandbox Sand CalculatorBags and pounds of play sand to fill a square or round sandbox.
- Potting Soil CalculatorQuarts, cubic feet and bags of potting mix to fill pots and planters.
- Fence Post Depth CalculatorHow deep to set fence posts, with hole size, post length and concrete bags.
- Gravel Driveway CalculatorTons and yards of gravel for a driveway, split into base and top layers.
- Fence Stain CalculatorGallons of stain or sealer for a wood fence, by length, height, sides and coats.
- Driveway Sealer CalculatorPails of asphalt driveway sealer by driveway size, coats and coverage.
Area & Volume
See all- Square Footage CalculatorSquare feet of rooms, homes and lots, with cost.
- Square Yard CalculatorSquare yards for carpet, sod and paving.
- Tile CalculatorTiles and boxes for a floor or wall, with grout joints and extra for cuts.
- Linear Feet CalculatorLinear feet from pieces or from an area to cover.
- Cubic Yard CalculatorCubic yards from any dimensions, with tons.
- Cubic Feet CalculatorCubic feet of boxes and cylinders, with gallons.
- Cubic Yards to Tons CalculatorCubic yards to tons and tons to yards, by material.
- Slope CalculatorSlope as a percent, angle in degrees, ratio and slope length from rise and run.
- Pool Volume CalculatorGallons and liters of water in a rectangular, round or oval pool.
- Firewood Cord CalculatorCords and face cords in a stack of firewood, with price per cord.
- Pool Salt CalculatorPounds and bags of salt to reach the target ppm in a saltwater pool.
- Septic Tank Size CalculatorMinimum septic tank size in gallons by number of bedrooms, from state rules.
- Log Weight CalculatorGreen weight of a log or tree trunk by diameter, length and species.
- Excavation CalculatorCubic yards to dig for a pit, trench or foundation, with sloped sides, swell and truckloads.
- Pond Volume CalculatorGallons and liters in a rectangular, round, oval or irregular pond, with pump size.
- Pool Shock CalculatorHow much chlorine or shock to add to raise free chlorine to a target level.
Carpentry & Roofing
See all- Soffit CalculatorSquare feet and panels of soffit, plus J-channel.
- Board Foot CalculatorBoard feet and cost for a lumber list.
- Stud CalculatorStuds, plates and stud length for a wall, with corners and openings.
- Deck CalculatorDeck boards, joists and screws for a rectangular deck.
- Drywall CalculatorSheets of drywall and screws for a room's walls and ceiling.
- Stair CalculatorRisers, treads, run and stringer length with code checks.
- Roof Pitch CalculatorPitch, angle, slope and roof area in squares.
- Rafter Length CalculatorCommon rafter length, rise and cut angle.
- Roofing CalculatorRoof area, squares and shingle bundles from the footprint and pitch.
- Siding CalculatorSquares of siding for walls and gables, with starter strip and fasteners.
- Ramp CalculatorRamp length, slope and landings for a given rise, using the ADA 1:12 limit.
- Board and Batten CalculatorBattens, linear feet and backing panels for a board and batten wall.
- Plywood CalculatorSheets of plywood or OSB for a floor, wall or roof, with waste.
- Metal Roof CalculatorMetal roofing panels, panel length, squares and ridge cap for a gable roof.
- Baluster CalculatorBalusters and exact spacing for a railing section, under the 4 in sphere rule.
- Deck Stain CalculatorGallons of deck stain or sealer for the floor and railings, by coats.
- Gutter CalculatorGutter length, sections, downspouts and end caps for a house.
- Shiplap CalculatorLinear feet and boards of shiplap for a wall, by exposed board width.
- Hardie Siding CalculatorHardiePlank lap siding planks for walls and gables, by plank width and exposure.
- Hip Roof CalculatorHip roof area, squares, ridge, hip and common rafter lengths from the footprint.
- Roof Truss CalculatorNumber of roof trusses, rise, top chord length and roof area for a gable roof.
- Gambrel Roof CalculatorGambrel roof area, squares, bundles, both rafter lengths and gable wall area.
- Deck Post Spacing CalculatorNumber of deck posts, even on-center spacing and footing concrete for a beam.
- Attic Ventilation CalculatorNet free vent area for an attic, split into soffit intake and ridge exhaust.
- Vinyl Siding CalculatorSquares and cartons of vinyl siding, plus starter strip, J-channel and corner posts.
- Roof Sheathing CalculatorSheets of plywood or OSB to deck a gable roof, from the footprint and pitch.
- Ice and Water Shield CalculatorRolls of ice and water barrier for eaves, valleys and roof penetrations.
Interior & Finishing
See all- Paint CalculatorGallons of paint for a room's walls and ceiling, by coats and coverage.
- Wallpaper CalculatorRolls of wallpaper for a room, with an allowance for pattern matching.
- Carpet CalculatorSquare yards of carpet off the roll, seams and pad for a room.
- Flooring CalculatorSquare feet and boxes of laminate, vinyl plank or hardwood, with waste.
- Baseboard CalculatorLinear feet and pieces of baseboard for a room, minus doorways.
- Crown Molding CalculatorLinear feet and pieces of crown molding for a room, with waste for miters.
- Ceiling Tile CalculatorDrop ceiling tiles, main beams, cross tees and wall angle for a room.
- Caulk CalculatorTubes of caulk or sealant for a joint, by bead size and cartridge size.
- Insulation CalculatorInsulation thickness and coverage for a target R-value, by material.
- Spray Foam CalculatorBoard feet, kits and R-value for open- or closed-cell spray foam.
- Grout CalculatorVolume and pounds of grout for a tiled floor or wall, by tile and joint size.
- Thinset CalculatorBags of thinset mortar for tile, by trowel notch and bag coverage.
- Mini Split Size CalculatorBTU and tons of cooling for a room, and the mini split or heat pump size to buy.
- Backsplash CalculatorSquare feet, tiles and boxes for a kitchen or bathroom backsplash.
- Wainscoting CalculatorPanel count, exact panel width and stile spacing for wainscoting or picture-frame molding.
Formulas on the page
Each calculator writes out the math it uses, so you can check it by hand.
Sourced constants
Bag yields, weights and code limits come from data sheets, standards and building departments, linked on every page.
Tested code
The same tested functions power the calculator and the worked examples. How we test.
Private by design
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