How thick should a concrete slab be?

Standard residential sidewalks and patios: 4 inches. Driveways: 4–6 inches. Garage floors: 4–6 inches. Structural slabs bearing heavy loads: 6+ inches. Always follow local building codes.

Should I order pre-mixed concrete or use bags?

For volumes over 1 cubic yard, order pre-mixed concrete delivery — it's cheaper and easier. For small projects under 0.5 cubic yards, 80-lb bags are practical. Between 0.5 and 1 yard, either can work.

How long does concrete take to cure?

Concrete reaches 70% strength in 7 days and full design strength in 28 days. You can walk on it in 24–48 hours and drive on it in 7 days. Curing is temperature and humidity dependent.

TheCalci

Concrete Calculator

Length (ft)

Width (ft)

Thickness (inches)

Area Length Standard

300×250

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