Concrete Calculator for Hole and Column — Estimate Volume, Cement, Sand & Gravel

When you need to pour concrete for a circular column, footing, or post hole, doing the math by hand is slow and confusing.

This concrete calculator for hole and column makes it simple. You just enter the diameter, height, and number of holes or columns, and it shows how much concrete you actually need — right away.

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It also tells you how many cement bags to buy and how much sand and gravel to mix, based on the regular 1:2:4 cement–sand–gravel ratio that most contractors use.
No formulas to remember, no spreadsheet needed.

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Whether you’re working on a gate column, fence post, or small footing, this hole and column concrete mix calculator helps you plan better.

You can use metric or feet units, and it automatically converts everything for you.

Most people overestimate and end up wasting half a bag here, a few kilos of sand there.

This concrete mix calculator keeps your numbers tight — so you mix what’s needed, not what’s left over.

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It’s a small tool, but a practical one for any builder or homeowner who wants strong concrete without the extra cost.