Construction & Home Improvement Calculators
Calculate exactly how much material you need and what it'll cost before you drive to the supply yard. Every estimator includes a 10-15% waste overage factor because real projects always need more than the math says. Concrete, paint, roofing, decking, fencing, and 30 more.
- ✓Material quantity estimators with built-in waste overage
- ✓Cost calculators for concrete, lumber, paint, tile, and more
- ✓Project-specific tools: decks, fences, roofing, HVAC sizing
- ✓Square footage and volume calculators for planning
Most used: Concrete Calculator, Square Footage Calculator, Paint Calculator
Try any of the 35 construction & home calculators below — or get one free for your AI.
Every calculator on this page is free to use right now. You can also download any one as a Claude skill file (free with email) to chat with it in Claude Code, ChatGPT, or any AI platform. Or get the full Construction Estimator Pack for $29.
Common workflows in this category
Click any scenario to jump into the calculator with the example pre-loaded.
35 free calculators
Asphalt Calculator
Calculate asphalt needed for driveway paving. Tons of asphalt for any thickness and area with waste factor.
Board Foot Calculator
Calculate board feet of lumber for any project. Convert lumber dimensions to board feet for accurate ordering.
Brick Calculator
Calculate how many bricks you need for a wall or patio. Brick calculator with mortar joints and waste factor.
Carpet Calculator
Calculate how much carpet and padding you need for any room. Get accurate estimates for carpet yardage and materials.
Concrete Calculator
Instantly calculate concrete needed for driveways, patios, and foundations. Concrete calculator with waste factor included.
Countertop Calculator
Calculate the square footage of countertop material you need for your kitchen or bathroom. Get accurate estimates for any layout.
Deck Calculator
Calculate how much wood lumber you need to build a deck. Includes decking boards, joists, and frame materials with waste factor.
Drywall Calculator
Calculate drywall sheets needed for walls and ceilings. Includes waste factor and conversion to full sheets.
Demolition Dumpster Calculator
Calculate what size dumpster you need for demolition or renovation waste. Get accurate estimates for debris volume.
Fence Calculator
Calculate how many fence posts and boards you need. Includes spacing, waste factor, and materials for wood fences.
Fertilizer Calculator
Calculate how much fertilizer you need for your lawn or garden area. Get precise nutrient recommendations based on square footage.
Flooring Calculator
Calculate hardwood, laminate, vinyl, and tile flooring needed. Includes waste factor for accurate material ordering.
Gravel Calculator
Calculate gravel needed for driveways, pathways, and landscaping. Gravel calculator with coverage and depth.
Gutter Calculator
Calculate how much gutter material and how many downspouts you need for your roof. Get accurate estimates for any roofline.
HVAC Sizing Calculator
Calculate the correct HVAC system size (BTU) for your home. Get accurate cooling and heating capacity recommendations.
Insulation Calculator
Calculate insulation R-value needed for your climate and coverage required. Find recommended insulation for attics, walls, and basements.
Lawn Seed Calculator
Calculate how much grass seed you need for your lawn size. Get accurate estimates for new lawns and overseeding projects.
Material Cost Estimator
Estimate the total material cost for your building or renovation project. Calculate project budget by material type and quantity.
Mulch Calculator
Calculate mulch needed for garden beds and landscaping. Includes bags and cubic yards for wood mulch and bark coverage.
Paint Calculator
Instantly calculate how many gallons of paint you need. Coverage calculator for interior walls, exterior, and trim with waste factor.
Paver Calculator
Calculate how many pavers you need for your patio or walkway. Get accurate estimates for any project size and paver shape.
Plywood Calculator
Calculate how many sheets of plywood you need for your building project. Get accurate estimates for any square footage.
Swimming Pool Volume Calculator
Calculate how many gallons of water your swimming pool holds. Accurate estimates for rectangular, oval, and circular pools.
Rebar Calculator
Calculate rebar needed for concrete slabs and foundations. Rebar spacing and grid calculator for structural reinforcement.
Retaining Wall Calculator
Calculate how many retaining wall blocks and material you need for your project. Get accurate estimates for any wall height.
Roofing Calculator
Calculate roofing squares and shingles needed for any roof. Includes waste factor for complex cuts and pitched roofs.
Shed Size Calculator
Calculate what size shed you need based on storage requirements. Get personalized recommendations for backyard sheds.
Siding Calculator
Calculate how much siding material you need for your house exterior. Get accurate square footage estimates instantly.
Soil Calculator
Calculate topsoil, fill dirt, or landscape soil needed for projects. Soil calculator with depth and coverage.
Square Footage Calculator
Calculate square footage for rooms, floors, and properties. Find exact area measurements for renovation, real estate, and project planning.
Stair Calculator
Calculate stair dimensions including rise, run, and number of steps to meet building code. Stair design calculator for interior and exterior.
Tile Calculator
Calculate tiles needed for floors and walls. Tile calculator with waste factor, grout spacing, and pattern layouts included.
Wallpaper Calculator
Calculate how many rolls of wallpaper you need for your room. Get accurate coverage estimates for any wall dimensions.
Window Size Calculator
Calculate the correct window size for your rough opening. Get accurate measurements for replacements and new installations.
Wire Size Calculator
Calculate the correct wire gauge size for your electrical circuit based on amperage and distance. NEC-compliant recommendations.