Free home and DIY project calculators
Estimate materials and measurements for your next project: concrete, brick, block, pavers, retaining walls, asphalt, fill dirt, volume, area, tile, flooring, drywall, paint, wallpaper, insulation, gravel, mulch, topsoil, sod and seed, lumber, fences, decks, roofing, siding, stairs and voltage drop. Every page shows its formula, assumptions and sources, plus metric results.
Home & DIY calculators
Concrete and masonry
Concrete Calculator (Bags and Cubic Yards)Estimate concrete for a slab, footing or post holes in cubic yards, cubic feet and cubic meters, and how many 40, 60 or 80 lb bags of mix you need.Concrete Slab & Pad CalculatorEstimate concrete for a slab, patio or pad, including an optional thickened edge and several identical slabs, in cubic yards, m³ and premixed bags.Cubic Yards and Cubic Feet CalculatorCalculate cubic yards and cubic feet for a box-shaped or round space, or convert between cubic feet, cubic yards, cubic inches and cubic meters.Brick and Mortar CalculatorEstimate how many bricks and how much mortar a single-wythe wall needs, using Brick Industry Association quantities, with waste allowances. Feet or meters.Concrete Block (CMU) CalculatorEstimate concrete blocks (CMU, cinder blocks) for a wall from its size and openings, with waste, mortar volume and preblended mortar bags.
Landscaping, yard and driveways
Gravel Calculator (Tons and Cubic Yards)Estimate gravel or crushed stone for a driveway, path or pad in cubic yards, cubic meters, tons and metric tonnes, with a waste allowance.Mulch Calculator (Cubic Yards and Bags)Estimate mulch for garden beds in cubic yards, cubic feet and bags from bed size and depth, using the extension-service 324 sq ft rule.Topsoil CalculatorEstimate topsoil for a lawn, garden or raised bed in cubic yards, cubic feet, cubic meters and bags from the area and depth, with an optional allowance.Sod and Grass Seed CalculatorEstimate sod in square feet, square yards, pieces and pallets, or grass seed in pounds from extension-service seeding rates, for a new lawn.Paver and Patio CalculatorEstimate patio or walkway pavers from the area and paver size or pieces per sq ft, plus base gravel and bedding sand volumes. Imperial or metric.Retaining Wall Block CalculatorEstimate retaining wall blocks and caps from wall length, exposed height and block size, including buried courses, with a waste allowance.Asphalt Calculator (Tons of Hot Mix)Estimate tons of hot-mix asphalt for a driveway, path or patch from length, width and compacted thickness, with an adjustable density and waste allowance.Fill Dirt Calculator (Cubic Yards, Tons and Truckloads)Estimate fill dirt for a low spot, hole or old pool in cubic yards, m³, tons and truckloads, with a compaction allowance and editable soil weight.
Floors, walls, paint and insulation
Square Footage CalculatorSquare footage for one or several rooms, with feet-and-inches or meters-and-centimeters input, per-room and total sq ft, sq yd and m², plus a waste allowance.Tile CalculatorEstimate how many tiles and boxes you need for a floor, wall or backsplash from the area, tile size, grout joint and a waste allowance. Imperial or metric.Flooring Calculator (Square Feet and Boxes)Estimate flooring for laminate, vinyl plank or hardwood: square feet with a waste allowance and the number of cartons, from the coverage on the box.Drywall Calculator (Sheets)Estimate drywall sheets for a room's walls and ceiling from its size, openings and panel size (4×8, 4×10, 4×12), with a waste allowance and m².Paint CalculatorEstimate how much paint you need for a room's walls (and ceiling) from its size, doors, windows, number of coats and the coverage on your paint can.Wallpaper Calculator (Rolls)Estimate wallpaper rolls from wall length, height, openings and pattern repeat, using the Wallcoverings Association usable-yield method. Feet or meters.Insulation Calculator (R-Value, Depth and Bags)Estimate how many inches of attic insulation reach a target R-value and how many bags to buy, with ENERGY STAR R-value levels shown as general information.
Carpentry, roofing and exterior
Board Foot CalculatorCalculate board feet for lumber from thickness, width, length and piece count, with a waste allowance, optional price per board foot and cubic meters.Stair Calculator (Rise and Run)Calculate the number of stair risers and treads, riser height, total run, stringer length and angle from the total rise, in inches or centimeters.Deck Board CalculatorEstimate how many deck boards you need from the deck size, board width, gap and board length, with linear feet and a waste allowance. Imperial or metric.Fence Calculator (Posts, Pickets and Rails)Estimate fence posts, pickets and rails from the fence length, post spacing, gates and picket width, with a waste allowance. Imperial or metric.Roofing Calculator (Squares and Bundles)Estimate roof area from the house footprint and pitch, then roofing squares and shingle bundles, with a waste allowance. Feet or meters.Siding Calculator (Squares)Estimate siding squares for a house from wall perimeter, wall height, gables and openings, with a waste allowance, using manufacturer estimating methods.
Electrical
How we keep it accurate
Formulas use exact unit conversions from NIST and published figures from manufacturers, extension services and state transportation departments, and every calculator is checked with automated test cases. Results are estimates: confirm quantities with your supplier and check local codes. Read more about JobsiteCalc.