Construction & Masonry Calculators
Free, accurate calculators for concrete, masonry, and building materials. Results update instantly as you type — no sign-up required.
Estimates volume and bags for any shape — slabs, columns, walls, tubes, and stairs.
Open calculator →Estimates volume and bags for a rectangular slab — including overage and bag count by size.
Open calculator →How many 40, 60, or 80 lb bags do you need?
Open calculator →Converts dimensions to volume for ordering ready-mix concrete.
Open calculator →Estimates CMU block count and mortar for any wall.
Open calculator →Estimates volume, bags needed, weight, and cost for foundation footers and piers.
Open calculator →Estimates total cost for any pour, with an editable price per yard.
Open calculator →Estimates total weight for any concrete pour — accounting for mix density.
Open calculator →Estimates volume and bags for round sonotube and column forms.
Open calculator →Estimates bags needed to set fence posts — for any number of posts and hole sizes.
Open calculator →Estimates volume for post holes — net minus post, square or round.
Open calculator →Estimates volume for concrete stairs by rise, run, and width.
Open calculator →Estimates volume, bags, and cost for a concrete driveway.
Open calculator →Estimates volume, bags, and cost for a concrete pad or patio.
Open calculator →Estimates volume and bags for concrete curb and gutter sections.
Open calculator →Estimates volume for slabs, cylinders, or any custom shape.
Open calculator →Estimates volume and bags for poured concrete walls.
Open calculator →Estimates volume and bags for round columns, piers, and sonotubes.
Open calculator →Estimates cement, sand, gravel, and water for any mix ratio.
Open calculator →Estimates volume, weight, and cost for asphalt — accounting for compaction and density.
Open calculator →Estimates sod rolls, pallets, and cost for lawn installation and grass replacement.
Open calculator →Estimates block count, courses, and cost for any landscape retaining wall.
Open calculator →Estimates volume, bags needed, weight, and cost for deck footings — round piers, square pads, or Bigfoot forms.
Open calculator →Estimates combined volume, bags needed, weight, and cost for a slab with thickened edge footings in one pour.
Open calculator →Estimates paver count, sand bed, and gravel base for patios, walkways, and driveways.
Open calculator →Estimates board count, linear footage, and cost for 90° and 45° deck layouts.
Open calculator →Estimates posts, rails, pickets, concrete bags, and cost for wood privacy fences.
Open calculator →Calculates total linear feet, meters, and cost for lumber, trim, and molding.
Open calculator →Calculates board feet and cost for lumber orders by thickness, width, and length.
Open calculator →Estimates gallons and cost for painting a room — accounts for doors, windows, and coats.
Open calculator →Estimates roof area, squares, bundles, and shingle cost by pitch and footprint.
Open calculator →Converts rise and run to pitch ratio, angle, slope percentage, and rafter length.
Open calculator →Calculates pool volume in gallons and liters, plus salt needed for saltwater pools.
Open calculator →Estimates sheets, screws, joint compound, tape, and cost for any room or project.
Open calculator →Estimates tile count, boxes, grout, and cost for floor and wall tile projects.
Open calculator →Estimates wallpaper rolls and cost — accounts for pattern repeat, doors, and windows.
Open calculator →Converts land dimensions to acres, square feet, square yards, square meters, and hectares.
Open calculator →Calculates common rafter length, overhang, plumb cut angle, and bird's mouth for any roof pitch.
Open calculator →Estimates net wall area, squares, and material cost for lap, shake, panel, and board-and-batten siding.
Open calculator →Calculates steps, rise and run per step, total run, stringer length, and IRC code compliance.
Open calculator →Estimates lbs of salt needed, bag count, and cost to reach your target salinity for saltwater pools.
Open calculator →Estimates bar count, total linear feet, weight, and cost for reinforcing a concrete slab.
Open calculator →Estimates stud count, plate linear footage, and board feet for wall framing — with corners and openings.
Open calculator →Calculates volume in gallons, liters, and cubic feet for any pipe by inner diameter and length.
Open calculator →Our free construction calculators turn the dimensions you already have into the order quantities you actually need — cubic yards of ready-mix, bags of concrete, board feet of lumber, square footage of shingles, and the cost of each. They are built for general contractors, masons, framers, and weekend DIYers who want a fast, defensible estimate before they call the supplier or rent the mixer. Every tool supports both imperial and metric units and lets you adjust the assumptions that quietly wreck most estimates: bag yield, material density, waste factor, and unit price.
What construction estimators get wrong
The biggest source of error is forgetting waste and over-rounding. A 10 ft by 10 ft slab poured 4 inches thick is 1.23 cubic yards of concrete, but order exactly 1.23 yd³ and a single wheelbarrow spill leaves you short — most pros add 5–10% overage, which our concrete slab calculator applies automatically. Bagged concrete is even less forgiving: that same slab needs roughly 56 eighty-pound bags, since each 80 lb bag yields only about 0.022 yd³. Roofing is sold by the “square” (100 ft²), so a 1,500 ft² roof with a 6:12 pitch covers about 1,680 ft² of actual surface — roughly 17 squares before the 10–15% waste allowance for hips, valleys, and starter courses.
Pick the right tool for the job
For driveways, footings, and patios, the concrete calculator handles slabs, columns, tubes, and stairs in one place and converts your measurements into both yardage and bag count. Framing a wall? The stud calculator figures stud count at 16-inch on-center spacing plus plates, accounting for corners and openings. Whatever the trade, start with the dimensions, confirm the density and waste defaults match your material, and you will have a supplier-ready estimate in seconds.