Cubic yards for a round footing or column — π × radius² × height ÷ 27

A round footing or column is π × radius² × height, ÷ 27 for cubic yards. Measure the form’s inside diameter — a 12-inch tube 4 ft deep is about 0.12 yd³.

A cylindrical concrete pier drawn with its dimensions and the volume formula. The volume of a round footing or column is pi times the radius squared times the height, then divided by 27 to convert cubic feet to cubic yards. The diagram marks the diameter across the top, the radius as half of it, and the height down the side, and notes that a Sonotube form is measured by its inside diameter. For example, a 12-inch-diameter tube 4 feet deep holds about 0.12 cubic yards. — Source: Cylinder volume V = π r² h (round-column take-off)

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A cylindrical concrete pier drawn with its dimensions and the volume formula. The volume of a round footing or column is pi times the radius squared times the height, then divided by 27 to convert cubic feet to cubic yards. The diagram marks the diameter across the top, the radius as half of it, and the height down the side, and notes that a Sonotube form is measured by its inside diameter. For example, a 12-inch-diameter tube 4 feet deep holds about 0.12 cubic yards.

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    <img src="https://remodelcalculators.com/api/figure-embed/round-footing-volume" alt="A cylindrical concrete pier drawn with its dimensions and the volume formula. The volume of a round footing or column is pi times the radius squared times the height, then divided by 27 to convert cubic feet to cubic yards. The diagram marks the diameter across the top, the radius as half of it, and the height down the side, and notes that a Sonotube form is measured by its inside diameter. For example, a 12-inch-diameter tube 4 feet deep holds about 0.12 cubic yards." width="800" height="480" style="width:100%;height:auto;border:0" loading="lazy">
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    Diagram: <a href="https://remodelcalculators.com/construction-diagrams/round-footing-volume" target="_blank" rel="noopener">Cubic yards for a round footing or column — π × radius² × height ÷ 27</a> — courtesy of <a href="https://remodelcalculators.com" target="_blank" rel="noopener">RemodelCalculators.com</a>
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