Home & Outdoor Project Calculators

Free tools that tell you how much material you need and what your project will cost.

Calculators

• Concrete Calculator — Calculate how many cubic yards of concrete and how many 40/60/80 lb bags you need for a slab, footing, or pad.
• Gravel Calculator — Calculate how many tons and cubic yards of gravel you need for a driveway, path, or drainage project.
• Mulch Calculator — Calculate how many cubic yards and 2 cu ft bags of mulch you need to cover a garden bed or landscaped area.
• Topsoil Calculator — Calculate how many cubic yards and tons of topsoil you need to fill a garden bed, lawn, or raised bed.
• Paint Calculator — Calculate how many gallons of paint you need for a room or wall based on area, number of coats, and coverage.
• Sod Calculator — Calculate how many pieces and pallets of sod you need to cover your lawn, including a waste allowance.
• Fence Calculator — Calculate how many fence posts and sections you need for a straight run of fence at your chosen post spacing.
• Deck Board Calculator — Calculate how many deck boards you need based on deck area, board width and length, including a waste allowance.
• Paver Patio Calculator — Calculate how many pavers you need for a patio, plus the gravel base, bedding sand, and edging — by patio size and paver dimensions.
• Retaining Wall Calculator — Calculate how many retaining wall blocks you need by wall size and block dimensions, plus cap blocks, gravel base, and drainage backfill.
• Roofing Shingle Calculator — Calculate how many bundles of shingles you need by roof footprint and pitch, plus roofing squares, total roof area, and underlayment rolls.
• Vinyl Plank Flooring Calculator — Calculate how many boxes of vinyl plank (LVP) flooring you need by room size, waste, and box coverage, plus total square footage and coverage purchased.
• Laminate Flooring Calculator — Calculate how many boxes of laminate flooring you need by room size, waste, and box coverage, plus total square footage and coverage purchased.
• Grass Seed Calculator — Calculate how much grass seed you need by lawn size and grass type, for a new lawn or overseeding — in total pounds and bags.
• Drywall Calculator (Sheetrock) — Drywall (sheetrock) calculator: find how many sheets you need for a room’s walls and ceiling, plus drywall screws, joint compound, and tape.
• Pool Volume Calculator — Pool volume calculator: find how many gallons your swimming pool holds by shape, size, and average depth — for rectangle, round, and oval pools.
• Raised Bed Soil Calculator — Calculate how much soil you need to fill a raised garden bed — in cubic feet, cubic yards, and bags — by bed size, fill depth, and number of beds.
• Lawn Fertilizer Calculator — Calculate how much lawn fertilizer you need by lawn size, nitrogen rate, and the bag’s nitrogen % (NPK first number) — in pounds of product and bags.
• Fence Post Concrete Calculator — Calculate how many bags of concrete you need to set fence posts, by post size, hole diameter, and depth — total and per post, for 50, 60, and 80 lb bags.
• Paver Base Calculator (Gravel & Sand) — Calculate how much gravel base and bedding (paver) sand you need under a paver patio or walkway, by area and base depth — in cubic yards, tons, and bags.
• French Drain Gravel Calculator — Calculate how much gravel a french drain needs by trench size and pipe diameter — in cubic yards and tons — plus drain fabric and perforated pipe.
• Plant Spacing Calculator — Calculate how many plants you need to fill an area at a given spacing, for square or triangular layouts — plus plants per square foot.
• Wallpaper Calculator — Calculate how many rolls of wallpaper you need by room size, wall height, pattern repeat, and roll dimensions — using the strip method.
• Thinset Mortar Calculator — Calculate how many 50 lb bags of thinset mortar you need for a tile job by area and trowel-notch size, with coverage per bag.
• Insulation R-Value Calculator — Calculate how much insulation you need to hit a target R-value by material — thickness in inches plus coverage in board feet — for attics, walls, and floors.

Cost Guides

• Cost to Build a Deck (2026) — Average deck-building costs by size and material, with an instant estimate.
• Cost to Pave a Driveway (2026) — What a new driveway costs by material and size, with a cost estimator.
• Cost to Install a Paver Patio (2026) — What a paver patio costs by size and material, with an instant estimate.
• Cost to Build a Retaining Wall (2026) — What a retaining wall costs by size and material, with an instant estimate.
• Cost to Replace a Roof (2026) — What a new asphalt shingle roof costs by size and pitch, with an instant estimate.
• Cost to Install Vinyl Plank Flooring (2026) — What vinyl plank (LVP) flooring costs to install by size and tier, with an instant estimate.
• Cost to Seed a Lawn (2026) — What seeding a new lawn or overseeding costs per square foot, with an instant estimate.
• Cost to Install Drywall (2026) — What hanging and finishing drywall costs per sheet and per square foot, with an instant estimate.
• How Many Gallons Is My Pool? (Pool Volume by Size) — How to find your pool’s volume in gallons by shape and average depth, with a typical-size reference and instant calculator.