Enter your dimensions and get the exact cubic yards you need — with waste factor and bag count included.
Results
Cubic Yards (exact)1.23yd³
With 10% Waste1.36yd³
60 lb bags needed82bags
80 lb bags needed62bags
Estimated cost$177at $130/yd
How to use this calculator
1Select your project type — slab, wall, footing, or column.
2Enter dimensions in feet. Thickness is entered in inches.
3Set quantity if you have multiple identical pieces.
4Order the "With 10% Waste" number — never the exact amount.
5Use the bag counts if you plan to hand-mix rather than order ready-mix.
Common questions
Concrete is always lost to spillage, uneven subgrade, and forms that flex under pressure. Running short mid-pour is expensive — you get a cold joint that weakens the slab. Order the waste number.
Standard residential slabs, patios, and garage floors are 4 inches. Driveways bearing car traffic are 4 inches. For trucks or RVs, use 5–6 inches.
Approximately 45 bags of 80 lb mix per cubic yard. For anything over 1 yard, ready-mix is almost always cheaper and faster once you factor in the labor of mixing bags.
Delivered ready-mix averages $125–$160 per cubic yard depending on region and mix design. Short-load fees for orders under 3–5 yards add $50–$150.
Yes. Large slabs are routinely poured in sections with control joints placed between them. The calculator's quantity field lets you calculate multiple identical pours at once.