Chalkline.Math

Calculators for your next project

Work out exactly what to buy before you head to the lumber yard. Quantities, concrete, shingles and a rough cost, with the math explained.

Fencing

Fence Calculator

Posts, rails, pickets, concrete bags and material cost for a wood fence, with gates and corners.

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Fence Picket Calculator

Pickets, spacing and fasteners for privacy, spaced and board-on-board fences.

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Fence Post Depth Calculator

How deep to set each post for your fence height and frost line, plus hole size and post length.

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Fence Post Concrete Calculator

Bags of concrete per post and in total, for 40, 50, 60 or 80 lb bags.

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Concrete

Concrete Slab Calculator

Cubic yards, bags, ready-mix cost and installed price for slabs, patios and driveways.

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Concrete Block Calculator

Blocks, mortar and core fill for a block wall, with a cost estimate.

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Sonotube Calculator

Concrete for deck and porch footing tubes, by diameter and depth.

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Roofing

Roofing Calculator

Roof area, squares, shingle bundles, underlayment and a replacement cost range.

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