Concrete Calculator
Estimate how much concrete you need in cubic yards, cubic feet, or pre-mixed bags. Works for slabs, footings, columns, and more.
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Frequently Asked Questions
How thick should a concrete slab be?
Standard residential slabs are 4 inches thick. Driveways and garage floors should be at least 4-6 inches. Heavy-load areas may need 6-8 inches.
How many bags of concrete make a yard?
It takes about 45 bags of 80 lb concrete mix or 60 bags of 60 lb mix to make one cubic yard.
Should I add extra for waste?
Yes. Always order 10% extra to account for spillage, uneven ground, and form variations.
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