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Calculate how much concrete you need for slabs, columns, walls, and footers. Get cubic yards, bags needed, and cost estimates.
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An 80-pound bag of concrete covers about 0.6 cubic feet. For a 10x10 foot slab that's 4 inches thick, you'd need about 56 bags of 80lb concrete (or 1.24 cubic yards of ready-mix).
Standard patio or walkway: 4 inches. Driveway: 5-6 inches. Garage floor: 4-6 inches. Foundation footer: 8-12 inches. Building codes may require specific thicknesses.
Ready-mix concrete costs about $125-175 per cubic yard delivered. Bagged concrete (80lb bags from Home Depot/Lowe's) costs about $5-7 per bag. For large projects (over 1 yard), ready-mix is more cost-effective.
We add a 10% waste factor to account for spillage, uneven ground, and settling. This is standard practice - ordering exact amounts often results in running short.
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