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How Much Concrete? Get the Quantities Right

Volume, bags, mix ratios and rebar — the exact site math, free in your browser.

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Concrete Volume Calculator (Slab)

Cubic metres / yards of concrete for a slab, with 5% waste included.

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Concrete Bags Calculator

How many premix bags (50 lb / 60 lb / 80 lb / 25 kg) your pour needs.

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Concrete Mix Ratio Calculator (Cement, Sand, Aggregate)

Cement bags, sand and aggregate for any nominal mix (1:2:4, 1:1.5:3 …).

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12mm Rebar Weight Calculator

Weight of 12 mm TMT/rebar per metre, per 12 m rod and per bundle.

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Brick Calculator (Wall)

Bricks and mortar for a wall — standard modular sizes, openings deducted.

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Plaster Calculator

Cement and sand for wall/ceiling plaster by area, thickness and mix.

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