Construction Calculators
37 free calculators across 6 categories.
Concrete Slab Calculator
Calculate exactly how much concrete you need for any slab. Enter length, width, and thickness to get cubic yards, cubic feet, and cubic meters instantly.
Open →Rebar Calculator
Calculate how much rebar you need for a concrete slab. Enter slab dimensions and bar spacing to get total linear feet, number of Grid Bars / Lines, and estimated weight.
Open →Concrete Column Calculator
Calculate how much concrete you need for round columns, piers, and sonotubes. Enter diameter, height, and number of columns to get cubic yards, cubic feet, cubic meters, and 80 lb bags.
Open →Concrete Block Calculator
Calculate how many concrete blocks (CMU) you need for any wall. Enter wall length and height to get block count, mortar bags, and wall area — with adjustable waste factor.
Open →Concrete Driveway Calculator
Calculate exactly how much concrete you need for a driveway. Enter length, width, and thickness to get cubic yards, cubic feet, cubic meters, and an optional cost estimate.
Open →Concrete Footing Calculator
Calculate how much concrete you need for rectangular spread footings, strip footings, and pad footings. Enter length, width, depth, and number of footings for exact cubic yards and an optional cost estimate.
Open →Concrete Bags Calculator
Calculate how many bags of concrete you need for slabs, footings, posts, patios, and other projects. Supports 40 lb, 50 lb, 60 lb, and 80 lb bags with adjustable waste factor.
Open →Post Hole Calculator
Calculate concrete, gravel, and excavation volume for fence posts, deck posts, pergola posts, and pole foundations. Accounts for post displacement and gravel base so you order the exact number of bags.
Open →Concrete Slab + Rebar Calculator
Combined slab and rebar calculator. Enter slab dimensions, thickness, and rebar spacing to get concrete volume in cubic yards plus total linear feet of rebar and weight in one step.
Open →Drywall Calculator
Calculate how much drywall you need for any room or project. Enter wall dimensions to get total sheets, joint compound, tape, and estimated cost — with a 10% waste factor included.
Open →Flooring Calculator
Calculate how much flooring you need for any room. Enter room dimensions, waste percentage, and box coverage to get total square footage, flooring required with waste, and boxes to order.
Open →Plywood Calculator
Calculate how many plywood sheets you need for any project. Enter area dimensions, sheet size, and waste percentage to get exact sheet count for subfloor, wall sheathing, or roof sheathing.
Open →Stud Calculator
Calculate how many studs you need to frame a wall. Enter wall length, height, stud spacing, and number of openings to get total studs, corner framing, and opening framing counts.
Open →Roof Pitch Calculator
Calculate roof pitch ratio (X:12), angle in degrees, slope percentage, and rafter length from rise and run. Instant results for any roofing or framing project.
Open →Roofing Calculator
Calculate roofing squares, shingle bundles, and material area for any roof. Enter length, width, pitch, and waste percentage to get exact shingle quantities for your project.
Open →Rafter Calculator
Calculate rafter length, total rafter length with overhang, roof angle, and slope percentage from rise and run. Instant results for any roof framing project — imperial and metric.
Open →Metal Roofing Calculator
Calculate metal roofing panel count, roof area, and fastener quantities. Enter roof dimensions, panel coverage width, panel length, pitch, and waste percentage for accurate metal roofing estimates.
Open →Lumber Calculator
Calculate lumber quantities, board feet, linear feet, and project cost for any framing or carpentry project. Supports common sizes (2×4 through 2×12) and custom dimensions with adjustable waste percentage.
Open →Stair Calculator
Calculate stair rise, run, number of steps, stringer length, and stair angle for any staircase. Enter total rise, desired riser height, and tread depth to get code-compliant stair dimensions.
Open →Siding Calculator
Calculate siding panels and material area for exterior walls. Enter wall height, width, number of walls, window and door openings, and waste percentage to get net wall area, required siding area, and panel count.
Open →Board Foot Calculator
Calculate board feet, lumber volume, and total wood quantity for woodworking, hardwood, framing, and timber projects. Enter exact thickness, width, and length to get board feet, cubic feet, cubic metres, and linear feet.
Open →Insulation Calculator
Calculate insulation rolls or batts required for walls, ceilings, attics, and floors. Enter area dimensions, coverage per roll, and waste percentage to get the exact quantity to order.
Open →Gravel Calculator
Calculate how much gravel you need for driveways, paths, and landscaping. Get cubic yards, cubic feet, cubic meters, and tons of gravel instantly.
Open →Mulch Calculator
Calculate how much mulch you need for garden beds and landscaping. Get cubic yards, cubic feet, cubic meters, and bags of mulch for any area.
Open →Sand Calculator
Calculate how much sand you need for leveling, paver bases, sandboxes, and construction. Get cubic yards, cubic feet, cubic meters, and tons of sand instantly.
Open →Asphalt Calculator
Calculate how much asphalt you need for a driveway, parking lot, or road. Enter length, width, and thickness to get cubic yards, cubic feet, cubic meters, and tons of hot-mix asphalt.
Open →Topsoil Calculator
Calculate how much topsoil you need for a garden bed, lawn, or landscaping project. Enter length, width, and depth to get cubic yards, cubic feet, cubic meters, and tons of topsoil.
Open →Aggregate Calculator
Calculate how much crushed stone or aggregate you need for driveways, drainage, base layers, and landscaping. Enter length, width, and depth to get cubic yards, cubic feet, cubic meters, and tons.
Open →Excavation Calculator
Calculate excavation volume, expanded soil, truckloads, and removal cost for basements, pools, trenches, foundations, and grading projects. Accounts for soil swell factor so you order the right number of trucks.
Open →French Drain Calculator
Calculate gravel, perforated pipe, filter fabric, and trench excavation for a French drain system. Accounts for pipe displacement and waste factor so you order the right amounts.
Open →Retaining Wall Calculator
Calculate retaining wall blocks, gravel base volume, backfill material, and project cost. Enter wall dimensions and block size to get an accurate material estimate.
Open →Paver Base Calculator
Calculate gravel base and sand bedding volumes for paver patios, driveways, and walkways. Get cubic yards, cubic feet, and cubic meters for both materials.
Open →Square Footage Calculator
Calculate square footage, square meters, perimeter, acres, and hectares for any shape — rectangle, square, triangle, or circle. Ideal for rooms, flooring, roofing, landscaping, and construction projects.
Open →Mortar Calculator
Calculate mortar volume, bags required, and unit counts for brick, block, stone, and masonry walls. Accounts for joint thickness, unit size, and waste factor.
Open →Grout Calculator
Calculate grout volume and bags required for floor, wall, bathroom, kitchen, and tile installation projects. Enter tile dimensions, joint width, tile thickness, and total area to get an accurate grout estimate.
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