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HardHatCalc

Materials & Cost Calculators

Free tools for estimating material quantities and costs — paint coverage, roofing bundles, adhesive volumes, welding time, and more. Get accurate numbers before you buy to reduce waste and stay on budget.

Most Popular

Parking Lot Size Calculator

Calculate total parking lot area, ADA-compliant spaces, striping needs, and paving cost estimates. Covers rectangle and L-shaped lots with US accessibility standards.

Seating Capacity Calculator

Estimate maximum seating capacity for theatres, banquets, classrooms, and restaurants. Accounts for aisle space, table layouts, and fire code clearances.

Tile Adhesive Calculator

Calculate tile adhesive quantity by area, tile size, adhesive type, and substrate. Covers thin-set, mastic, and epoxy with trowel size guidance and cost estimates.

Sqft to Percentage Calculator

Convert square footage to percentage of total area. Useful for lease breakdowns, HVAC load allocation, cost sharing, and building code compliance checks.

Roofing Shingle Bundle Calculator

Calculate how many shingle bundles your roof needs. Accounts for roof pitch, waste factor, ridge caps, and gives bundle and square counts with cost estimates.

Door Swing Clearance Calculator

Calculate door swing clearance depth, width, arc area, and ADA compliance. Covers standard, pocket, barn, and bifold doors with building code guidance.

Ceiling Paint Calculator

Calculate how much ceiling paint you need by room size, paint type, and number of coats. Includes coverage rates, cost estimates, and drying times for flat latex, primer, and textured paint.

Weld Time Calculator

Estimate welding time, filler material weight, shielding gas usage, and labour cost. Compares MIG, TIG, and stick processes for butt, fillet, lap, and groove joints.

Pergola Size & Spacing Calculator

Calculate pergola post count, rafter spacing, beam lengths, and total material cost. Covers wood (4×4, 6×6), aluminium, and vinyl with post spacing guidance.

Weld Deposition Rate Calculator

Calculate welding deposition rates and electrode consumption for SMAW, GMAW, and FCAW processes. Estimate filler metal weight and cost per project.

Paint Ratio Calculator

Calculate paint mixing ratios for two-part coatings. Get exact hardener and reducer volumes for epoxy, polyurethane, urethane, and primer systems.

Gutter Sizing Calculator

Size gutters and downspouts for your roof area, pitch, and local rainfall intensity. Get recommended gutter width, downspout count, material type comparison, and cost estimates based on SMACNA standards.

Drywall Joint Compound Calculator

How much mud and tape does your drywall job need? Get quantities for joint compound, paper tape, and corner bead matched to your finish level.

Septic Cost Calculator

Estimate septic system installation costs including tank, drain field, excavation, and permits. Adjust for soil type, home size, and local permit fees to build an accurate budget for conventional gravity systems.

Inlet Capacity Calculator

Calculate storm drain inlet capacity by type, grate size, and rainfall intensity. Size grate, curb, and combination inlets for parking lots, roads, and commercial sites using the rational method.

Cabinetry Material Calculator

Turn your cabinet design into a supplier order list. Outputs plywood sheet count, hardware quantities, edgebanding length, and cost ranges by material type.

House Painting Cost Calculator

Estimate interior house painting costs by wall area, room count, paint quality, and number of coats. Compare DIY material costs against professional labour rates to build a realistic painting budget.

Wall Soundproofing Calculator

Estimate soundproofing materials for walls — mass-loaded vinyl, resilient channel, acoustic insulation, and double drywall. Enter wall area, height, and method for a complete material list with costs.

Insulation Requirement Calculator

Find the minimum R-value for your climate zone and estimate insulation quantities for walls, attics, and floors. Covers fiberglass batts, mineral wool, blown-in cellulose, and spray foam with 2026 cost estimates.

Cabinet Paint Calculator

Refinishing kitchen cabinets? See exactly how much paint, primer, and prep supplies you need based on door count, cabinet size, and finish type.

Door Frame Size Calculator

Calculate door frame dimensions, jamb width, rough opening size, and trim requirements from wall thickness and door size. Covers prehung and site-built frames for interior and exterior doors.

Spray Foam Cost Calculator

Estimate open-cell and closed-cell spray foam insulation costs per board foot. Enter area, desired R-value, and foam type for material and labour totals.

Masonry Wall R-Value Calculator

Calculate the composite R-value of a masonry wall assembly. Select CMU type, core fill, insulation, furring, and finishes to see total thermal resistance.

Ceiling Tile Layout Calculator

Plan a suspended ceiling grid layout. Enter room dimensions and tile size to get quantities for tiles, main runners, cross tees, wall angle, and hanger wire.

Drywall Sheet Calculator

Count drywall sheets for walls and ceilings. Enter room dimensions, sheet size, and openings to get sheets, screws, tape, and joint compound totals.

Fence Material Calculator

Build a complete fence material list. Enter fence length, height, and style to get post, rail, picket, concrete, and hardware quantities with cost estimates.

Window & Door Sizing Calculator

Find the right rough opening size for windows and doors. Enter unit dimensions to get framing requirements, shim space, and standard size matches.

Siding Material Calculator

Estimate siding quantities for vinyl, fiber cement, wood, or engineered wood. Enter wall area, subtract openings, and get squares, starter strips, trim, and costs.

Fence Post Depth Calculator

How deep should fence posts be? Enter fence height, soil type, and frost depth to get minimum burial depth, hole diameter, and concrete volume per post.

Retrofitting Cost Calculator

Estimate energy retrofit costs for insulation, windows, HVAC, and air sealing upgrades. See project costs, annual savings, and payback period for each measure.

Waterproofing Membrane Calculator

Estimate below-grade waterproofing membrane quantities and costs for foundation walls. Enter wall area, membrane type, and options to get rolls, primer, drainage board, and total project cost.

Fireproofing Material Calculator

Estimate fireproofing material for structural steel. Enter beam size, fire rating, and method to get SFRM thickness, coverage, and intumescent coating quantities.

Excavation Volume Calculator

Calculate excavation volume for trenches, pits, and graded areas. Enter dimensions, slope, and soil type to get cubic yards, swell factor, and hauling estimates.

Sliding Door Cost Calculator

Estimate sliding patio door costs by size, frame material, glass type, and installation scope. Compare replacement vs new construction pricing to budget your door project accurately.

Mortar Calculator

Calculate mortar bags or site-mix components by masonry unit type, wall area, joint thickness, and mortar type. Covers Type N, S, M, and O with cost estimates.

Thinset Calculator

Calculate thinset mortar bags by tile size, trowel notch, area, and product type. Compares modified vs unmodified thinset with coverage rates and cost estimates.

Grout Calculator

Calculate grout bags by tile size, joint width, tile thickness, and area. Covers sanded, unsanded, and epoxy grout with coverage rates and cost estimates.

Deck Board Calculator

Calculate deck board count, fasteners, and waste by deck area, board size, layout pattern, and material type. Covers pressure-treated lumber and composite with cost estimates.

Underlayment Calculator

Calculate underlayment rolls or sheets by floor area, flooring type, and subfloor condition. Covers foam, cork, plywood, and cement board with tape and moisture barrier estimates.

Vapor Barrier Calculator

Calculate vapor barrier sheeting, tape, and fasteners for crawl spaces, basements, walls, and under-slab installations. Covers 6-mil, 10-mil, and 20-mil poly with cost estimates.

Concrete Driveway Cost Calculator

Estimate concrete driveway costs including concrete, subbase, reinforcement, finishing, and labour. Adjust for driveway size, thickness, finish type, and region to build a realistic budget.

Gravel Calculator

Calculate gravel volume, tonnage, bags, and cost for driveways, walkways, patios, and drainage projects. Enter area dimensions and depth, choose gravel type, and get a full material estimate with delivery pricing.

Brick Calculator

Estimate brick count, mortar bags, and material cost by wall area, brick format, bond pattern, joint thickness, and wall type. Covers modular, queen, US standard, and UK metric brick.

Sand Calculator

Estimate sand volume, tonnage, bag count, and cost for sandboxes, paver bases, concrete subgrades, and drainage fill. Enter length, width, and depth, choose play, masonry, construction, or fill sand, and get a full material estimate with optional delivery.

Mulch Calculator

Estimate mulch volume, bag count, bulk delivery cost, and annualised refresh budget for hardwood, bark, pine straw, rubber, or dyed mulch. Enter bed dimensions, depth, and refresh cycle to size the order and project the recurring spend.

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