How many bags of concrete make 1 cubic yard?

It takes forty-five 60-lb bags or thirty-four 80-lb bags of pre-mixed concrete to equal 1 cubic yard. If using 50-lb bags, you will need approximately fifty-four bags.

What is the standard waste factor when ordering ready-mix concrete?

The standard waste margin is 10% for typical residential slabs and shallow footings. For complicated excavations, irregular subgrades, or line pumping, order between 10% and 15% extra to avoid short-load charges.

How thick should a concrete slab be?

A residential sidewalk, patio, or shed floor typically requires a 4-inch slab thickness. Driveways and garage floors holding passenger vehicles require at least 5 to 6 inches of reinforced 3,500–4,000 PSI concrete.

Is it cheaper to buy concrete by the bag or have a truck deliver it?

For projects under 1 to 1.5 cubic yards (around 45 to 60 bags), buying packaged bags and renting a small mixer is generally more economical. For projects requiring 2 cubic yards or more, ordering ready-mix truck delivery is significantly cheaper and saves hours of heavy labor.

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How Much Concrete Do I Need for a Slab? Complete Pouring & Cost Guide

Every successful concrete pour starts with one critical task: learning how to figure concrete for slab volume before you call the ready-mix plant. Whether you are pouring a driveway, patio, or shed foundation, an accurate estimate saves you money and…

astra6
September 16, 2026