Concrete Calculator
Estimate cubic yards of concrete needed for a slab, and how many bags.
Ordering concrete by the truckload means getting the volume right — order too little and you're stuck mid-pour; order too much and you're paying for waste.
Why depth matters more than people expect
A slab's volume scales directly with depth — doubling the depth doubles the concrete needed for the same footprint.
Frequently asked questions
Should I order extra concrete beyond the calculated amount?
Most contractors add a 5-10% buffer for spillage and measurement variance.
How many 60lb bags equal a cubic yard?
Roughly 60 bags — for large pours, ready-mix delivered by truck is usually more practical.