18 tools
Home Improvement & Garden Calculators
Work out how much material a project needs — and what it will cost — before you go to the store. Each calculator shows the waste factor and the assumptions it used.
Home & Garden
Generator Watts
Pick the appliances you want to run and get the exact generator size you need — running watts plus real surge math.
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Home & Garden
BTU Calculator
Enter your room size and conditions to get the exact cooling BTU, tonnage, and unit type you need — plus a furnace estimate. Imperial and metric.
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Home & Garden
Insulation Calculator
Enter your ZIP to get the R-values recommended for your climate zone (attic, walls, floor), how many inches of each material that takes, plus cost, savings, and the federal tax credit.
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Home & Garden
Concrete Calculator
Enter your slab, footing, wall, or column dimensions to get the cubic yards, number of 40/60/80 lb bags, and ready-mix cost — plus a gravel, sand, topsoil, and mulch calculator.
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Home & Garden
Fence Calculator
Enter your fence length, height, and material to get the installed cost and a full bill of materials — posts, rails, pickets, and bags of concrete.
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Home & Garden
Deck Calculator
Enter your deck size and material to get the boards, joists, footings, and fasteners you need, plus an installed cost estimate for wood, composite, and PVC.
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Home & Garden
Paint Calculator
Enter your room size or wall area, coats, and doors and windows to get the gallons of paint you need and the cost. Brand-neutral coverage rates.
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Home & Garden
Flooring Calculator
Enter your room size, flooring type, and layout pattern to get the boxes you need — with the correct waste factor per pattern — plus the cost.
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Home & Garden
Wallpaper Calculator
Enter your room size or wall width, roll size, and pattern repeat to get the exact number of wallpaper rolls you need and the cost — with the pattern-repeat and drop-match waste other calculators skip.
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Home & Garden
Carpet Calculator
Enter your room size to get the carpet in square yards and running feet off a 12-ft roll — seams and waste included — plus the installed cost with padding and labor.
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Home & Garden
Drywall Calculator
Enter your room size to get the drywall sheets, joint compound, tape, and screws you need — plus the installed cost with labor. Full materials bill, brand-neutral rates.
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Home & Garden
Roofing Calculator
Enter your roof footprint and pitch to get the true roof area, roofing squares, shingle bundles, and installed cost for asphalt, architectural, and metal.
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Home & Garden
Driveway Cost Calculator
Compare installed cost for gravel, asphalt, concrete, and paver driveways side by side — plus the annual cost of ownership by lifespan.
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Home & Garden
Grass Seed & Sod Calculator
Enter your lawn size to get how much grass seed (by grass type), fertilizer, and sod you need — for new lawns and overseeding.
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Home & Garden
Appliance Electricity Cost Calculator
Pick an appliance (or enter watts) and your state to see what it costs to run per day, month, and year — with real state electricity rates.
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Home & Garden
Planting Calendar
Enter your ZIP code to get personalized dates to start seeds, transplant, and harvest 20 common vegetables and herbs, based on your climate zone frost dates.
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Home & Garden
Solar Panel Calculator
Enter your monthly electric bill and state to estimate solar system size, cost, the 30% federal tax credit, annual savings, and payback — no email required.
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Home & Garden
Renovation Cost Calculator
Pick a home project (kitchen, bath, roof, addition, and more) and your state to get a localized installed cost range, adjusted for budget or high-end scope.
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