Chalkline.Math

Calculators for your next yard project

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

Fence Calculator

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

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Fence Post Depth Calculator

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

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Fence Post Concrete Calculator

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

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Concrete Block Calculator

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

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More calculators are on the way, including roofing and fence pickets.