Sizing the pour
A two-car driveway is typically 10 × 20 feet; at the standard 4-inch thickness that's about <strong>2.5 cubic yards — roughly 55 bags</strong>, which is exactly the point where bagged concrete stops making sense and a ready-mix truck becomes the right answer. Enter your real dimensions and the calculator draws the line for you.
What a driveway pour needs beyond volume
Driveways carry vehicles, so plan 4 inches minimum over compacted gravel, #4 rebar on 2-foot centers or 6×6 mesh, and control joints every 8–10 feet. Order 10% extra concrete for subgrade soft spots — and schedule the truck for a morning pour so you have full daylight to finish.