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Construction & DIY Calculators

Free Online Construction & DIY Tools

Explore 45 free construction & diy calculators. Accurate, fast, and mobile-friendly tools for all your calculation needs.

Available Construction & DIY Calculators

  • Flooring Transition Calculator - Recommend transition types (T‑molding, reducer, threshold, ramp), estimate quantities, consumables, and costs based on height differences and lengths.
  • Construction Permit Fee Calculator - Estimate permit fees by valuation tiers, plan review multipliers, expedited review, trade sub-permits, and surcharges for residential and commercial projects.
  • Building Code Compliance Calculator - Simplified pre-check for occupancy, egress, travel distance, corridor width, fire protection, and story limits to flag potential code gaps early.
  • Construction Timeline Calculator - Estimate project duration with phase breakdown considering size, complexity, crews, season, supply risk, and expedited permitting.
  • Material Waste Calculator - Estimate total material required with cutting loss, breakage, rounding, and recommended overage for tile, pavers, lumber, and drywall.
  • Construction Equipment Rental Calculator - Total rental cost including base rate, delivery/pickup, fuel, optional operator labor, overtime surcharge, cleaning/damage allowance, and taxes.
  • Green Building Cost Calculator - Estimate green premium, incentives, and annual savings from energy, water, and maintenance measures, plus simple payback and a CO₂e reduction proxy.
  • Attic Insulation Calculator - Estimate attic insulation thickness, material quantities (batts, blown, spray foam), ventilation NFA guidance, and costs by climate zone.
  • Basement Waterproofing Calculator - Estimate coatings, membrane, French drain materials, sump pump sizing, crack injection, and total project cost with unit toggle and validation.
  • Pool Construction Calculator - Estimate materials, excavation volume, rebar, plumbing, and costs for new pool construction with dimensions, depth profile, and finish type.
  • Garage Construction Calculator - Plan a garage build with materials: slab concrete, walls, roof framing, doors, windows, and cost estimating by dimensions and options.
  • Deck Railing Calculator - Calculate deck railing posts, balusters, rails, and hardware by deck perimeter, spacing rules, and code-based height options.
  • Gutter Calculator - Estimate gutter and downspout lengths, sizes, hangers, and runoff capacity by roof area, slope, and rainfall intensity.
  • Chimney Calculator - Estimate chimney height, flue size, masonry units, and mortar volumes for fireplaces and appliances per draft and clearance rules.
  • Retaining Wall Calculator - Estimate modular block counts or concrete volume, gravel base, geotextile, backfill, and drainage pipe for planning a retaining wall.
  • Driveway Calculator - Estimate asphalt, concrete, or gravel driveway quantities: area, surface volume, base volume, tonnage, and planning costs.
  • Paint Calculator - Estimate the amount of paint needed for your walls, accounting for windows and doors.
  • Flooring Calculator - Calculate the total area of flooring material needed for a room, including wastage.
  • Concrete Calculator - Estimate the volume of concrete needed for a slab, footing, or column project.
  • Board Foot Calculator - Calculate the volume of lumber in board feet, the standard measurement for woodworkers.
  • Decking Calculator - Estimate the number of deck boards required for your project based on its dimensions.
  • Stair Calculator - Calculate the number of steps, riser height, and total run for a safe and compliant staircase.
  • Roofing Calculator - Estimate the number of roofing squares and bundles of shingles needed for your roof.
  • Tile Calculator - Calculate the number of tiles needed for a floor or wall, including a recommended waste factor.
  • Insulation Calculator - Estimate the number of insulation rolls or batts needed to cover a specific area.
  • Drywall Calculator - Calculate the number of drywall sheets required to cover the walls and ceiling of a room.
  • Wall Stud Calculator - Calculate the number of wall studs needed to frame a wall of a given length and stud spacing.
  • Fence Calculator - Estimate the materials needed for a fence project, including posts, pickets, and rails.
  • Paver Patio Calculator - Calculate the amount of pavers, gravel base, and sand needed for a new patio.
  • Grout & Thin-set Calculator - Estimate the amount of grout and thin-set mortar needed for a tile project.
  • Rafter Length Calculator - Calculate the precise length of a common roof rafter based on span and pitch.
  • Wallpaper Calculator - Estimate the number of wallpaper rolls needed for a room, accounting for pattern repeat.
  • Deck Footing Calculator - Calculate the volume of concrete needed for cylindrical deck footings.
  • Construction Angle (Pythagorean) Calculator - Use the Pythagorean theorem to ensure corners are perfectly square (90 degrees).
  • Landscaping Material Calculator - Estimate the volume of mulch, soil, or gravel needed to cover a garden bed or area.
  • Siding Calculator - Estimate the amount of siding material needed to cover the exterior walls of a house.
  • Foundation Calculator - Estimate concrete, excavation, and rebar needs for slab or perimeter footing foundations. Includes waste allowance and bag counts.
  • HVAC Sizing Calculator - Estimate sensible and latent loads, total BTU/h, cooling tons, and ventilation CFM using envelope and usage inputs.
  • Electrical Load Calculator - Estimate residential electrical demand load (W), service amperage at 120/240V, and a recommended main breaker size using demand factors.
  • Plumbing Pipe Sizing Calculator - Estimate total fixture units (WSFU), convert to flow (GPM), and recommend a planning pipe size with velocity and pressure drop checks.
  • Structural Beam Calculator - Estimate max bending stress and deflection for rectangular beams under uniform load; compare to basic allowables for a quick reasonableness check.
  • Window and Door Calculator - Calculate openings area, trim linear feet, drywall patching, and a simple materials + labor cost estimate for windows and doors.
  • Excavation Volume Calculator - Estimate cut volumes for pits, trenches, and circular excavations with optional side slopes, plus topsoil strip and hauling loads.
  • Septic System Calculator - Preliminary septic sizing: daily flow, recommended tank size, drainfield area and trench length, and a simple cost estimate.
  • Solar Panel Installation Calculator - Estimate panel count, system size (kW), production, roof area needs, incentives impact, and simple payback based on usage and site.

Why Use Our Construction & DIY Calculators?

  • 100% Free - No hidden costs or subscriptions
  • No registration required
  • Mobile-friendly and responsive design
  • Accurate and reliable calculations
  • Instant results