Construction Material Calculators
Material calculators for roofs, driveways, patios, yards, fences and walls — buy the right amount, once.
Measure once, get the purchase quantity — rolls, bags, pallets or tons — with a spare allowance you can see and change. Every published figure is traced to its specification with the date it was read, and a starting value the calculator chose itself says so.
Yard & landscaping
Ground cover sold by the roll, the bag, the pallet or the cubic yard.
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Sod Calculator — How Much Sod or Turf You Need
Measure a lawn in rectangles and get the rolls, slabs or pallets of sod (turf) to order, with an adjustable allowance for cutting around beds and curves.
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Grass Seed Calculator — Pounds per Lawn
Pounds of seed for a lawn, at a rate one of four university extension services publishes.
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Topsoil Calculator — Raised Beds and Fill
Topsoil, compost or soilless mix for a raised bed, a new lawn or a top-up, by the cubic yard or the cubic foot, at the depths and mixes extension services publish.
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Paver Base Calculator — Base and Bedding Depth by Area
The stone base and bedding course under a patio, walkway or driveway, with the published minimum depth for what it carries.
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Retaining Wall Block Calculator — Courses and Block Count
Blocks, caps and stone for one garden wall.
Structural & exterior
Framing, surfaces and boundaries — the parts a building official may inspect.
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Driveway Asphalt Calculator — Tons by Area and Depth
Tons of hot-mix asphalt for a driveway or parking area at a chosen compacted depth, plus the crushed stone base under it.
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Roof Pitch and Rafter Length Calculator
Rafter length for a two-slope gable roof from its width and pitch, ridge deducted once, and the boards to buy, worked out against the lengths your own yard stocks.
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Fence Calculator — Posts, Rails and Post-Hole Mix
Posts, rails, boards and post-hole mix.
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Slate Roof Calculator — Slates by Size and Headlap
Slates a roof takes, from the published schedule for size and lap, breakage included.
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Tile and Grout Calculator — Cartons of Tile and Bags of Grout
Tile cartons and grout bags, from the grout maker’s own chart for your tile and joint.
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Brick Calculator — Bricks and Mortar per Wall
Brick and bags of mortar mix for one wall. Two publishers count brick differently, and the page asks whose count to use.
What is here today
11 calculators are finished and linked above. More are being built; none of them is linked until it works, so nothing on this page leads to a page that is not there.
How this site works
- Nothing is sold here and no details are collected. There is no form that sends your measurements anywhere — the arithmetic runs in your browser and stays there.
- Advertising pays for the site. Ad placement never changes a calculated figure, and no advertiser chooses which specification a tool reads.
- Every figure a publisher printed is shown with a link to the document, the section it is in and the date it was read. Where a calculator starts from a value nobody publishes — an allowance, a rounding step, a way of counting — it says beside the value that the choice is its own.
- These are estimates for planning and buying. Site conditions a calculator cannot see — slope, obstacles, how a supplier actually packs a pallet — change the real answer, so each tool names who to confirm the quantity with before you buy.