Complete Concrete Project Estimator
Estimate cubic yards, waste, ready-mix trucks, bag equivalents, material cost, placement duration, and order rounding from one set of project dimensions.
Editorial review: 2026-09-29 · How we review technical content
Key takeaways
- Build a full material-and-logistics estimate for a rectangular concrete placement from field dimensions.
- Actual ready-mix pricing, truck capacity, short-load charges, minimums, bag yield, pump waste, and site access vary by supplier and project.
Complete Concrete Project Estimator
Build a full material-and-logistics estimate for a rectangular concrete placement from field dimensions.
What this calculator does
Build a full material-and-logistics estimate for a rectangular concrete placement from field dimensions.
The calculator first finds geometric volume, converts it to cubic yards, applies the selected allowance, then shows truck-load equivalents, bag equivalents, approximate concrete cost, and placement hours at the entered production rate.
How to use the result
Actual ready-mix pricing, truck capacity, short-load charges, minimums, bag yield, pump waste, and site access vary by supplier and project.
How this calculator works
The estimator first calculates rectangular volume as length × width × thickness, converts cubic feet to cubic yards, then applies the entered allowance. Truck count and bag equivalents are planning conversions based on the capacities/yields you enter; cost and placement time are direct extensions of the entered price and production rate.
Break irregular projects into separate rectangles, footings, walls or cylinders instead of forcing every shape into one rectangle. The allowance is not a substitute for measuring thickened edges, over-excavation, pump prime, line waste or a highly variable subgrade.
Input checklist
- Length: Enter the project-specific length in ft.
- Width: Enter the project-specific width in ft.
- Thickness: Enter the project-specific thickness in in.
- Allowance: Enter the project-specific allowance in %.
- Truck capacity: Enter the project-specific truck capacity in yd³.
- Ready-mix price: Enter the project-specific ready-mix price in $/yd³.
- Placement rate: Enter the project-specific placement rate in yd³/hr.
- 80-lb bag yield: Enter the project-specific 80-lb bag yield in ft³/bag.
Worked example
A 30 ft × 12 ft slab at 4 in. thick contains about 4.44 yd³ before allowance. An 8% allowance brings the planning quantity to about 4.80 yd³; the tool then translates that into the truck, bag, cost, and production assumptions you entered.
Field checklist
- Verify finished form dimensions and thickness.
- Check subgrade elevations at several locations.
- Confirm supplier truck capacity and pricing.
- Choose a realistic placement rate for access and crew size.
- Recalculate after any field change.
References & further reading
- ACI SPEC-301-20 — Specifications for Concrete Construction — Reference specification used when incorporated into project specifications.
- NRMCA Concrete In Practice (CIP) — Industry education covering common concrete field problems and practices.