Volume, weight, bags vs. truck orders, rebar & cost in one estimate
Pour Sections combine a main slab with steps, footings, or thickened edges into one order
Unexcavated soil is rarely perfectly flat — this adds volume for low spots in the sub-base.
Leave blank to use the standard default: 150 lb/ft³ (≈4,050 lb/yd³) for normal-weight concrete. Typical range: 140–155 lb/ft³.
Please enter valid dimensions for at least one section.
Total Concrete Needed
–cubic yards
– cu ft · – m³
Real-World Ordering Equivalents
Estimate Your Cost
National average ballpark is roughly $130–$180 per cubic yard adjust to your local supplier's price.
Section Breakdown
Project Inputs
Estimates are approximate and based on standard industry densities, bag yields, and rebar spacing rules of thumb. Always confirm quantities, mix design, and reinforcement with your ready-mix supplier or a structural engineer before ordering.
Pour the right amount of concrete the first time. QuickTonnage's concrete slab calculator turns your slab's length, width, and thickness into cubic yards, bag counts, or a ready-mix truck order in seconds.
Wondering how much concrete you need before you even open the calculator? Here's the short version.
This concrete slab calculator runs the same math instantly for your exact dimensions, so you don't have to guess.
At 4 inches thick, a 10×10 ft slab needs about 1.23 cubic yards of concrete, plus a 5% waste buffer.
A standard ready-mix truck carries about 10 cubic yards. Orders under 5 yards often carry a short-load fee.
Most patios and walkways use 4 inches. Driveways and garage slabs typically need 4–6 inches to handle vehicle loads.
Yes. Under 1 cubic yard, bagged concrete is usually more practical than ordering a ready-mix truck.