Component takeoff
Every addition and subtraction remains visible before project overage.
| Component | Shape | Action | Qty | Each volume | Project effect |
|---|
OneFreePlace · Tool #155
Concrete quantity from geometry to the order you actually place.
Combine slabs, footings, columns, tubes, tapered pours, solid stair masses and custom volumes in one project. Add or subtract components, keep net volume separate from waste, round ready-mix orders, compare bag yields, estimate truck loads, weight and entered costs.
✓ Multi-pour project✓ Additions + voids✓ Ready-mix order rounding✓ Bag-yield comparison✓ Weight + cost + sensitivity
Concrete Calculator
project geometry · ready mix · bags · weight · cost
Project takeoff
Build the pour from components.
Concrete componentsAdd material volumes or subtract voids/openings. Use inside form dimensions wherever practical.
Overage & ready-mix orderingOverage is explicit; order rounding is shown separately instead of being hidden inside “waste.”
Overage volume, order increment, truck capacity and ready-mix price use cubic yards.
Bagged concreteReference yields are editable because packaged products vary. QUIKRETE’s standard Concrete Mix data lists 40/50/60/80/90 lb yields of 0.30/0.375/0.45/0.60/0.675 ft³.
Bag yield is cubic feet per bag. Presets are references, not a substitute for the actual product label/data sheet.
Mass / logistics referenceNormalweight concrete commonly falls around 140–150 lb/ft³ (2240–2400 kg/m³). Use the supplier’s fresh density when known.
Density is lb/ft³.
Concrete project result
Calculating—
ready-mix order volume
Enter valid project geometry.
Net geometry—additions minus voids
After overage—before order rounding
Order rounding surplus—beyond overage-adjusted need
Selected bag count—using entered bag yield
Concrete mass—using entered density
Truck loads—mathematical capacity estimate
Quantity estimateForm dimensions, subgrade variation, spillage, pump/line waste and supplier minimums can change actual ordering needs.
Ready-mix order plan
Net geometry, explicit overage and order-increment rounding are separated for auditability.
Bag comparison
Reference bag yields help compare handling counts. Always replace a preset with the actual product yield when it differs.
| Reference | Yield | Bags for adjusted volume | Total reference dry weight |
|---|
Selected bag plan
Selected/edited bag yield, optional pallet count and optional entered price.
Overage sensitivity
See how ready-mix order volume and selected bag count change at common overage assumptions.
| Overage | Adjusted volume | Rounded order | Selected bags | Order surplus |
|---|
Formula audit
Shape equations, additions/voids, overage, bag yield and order rounding remain explicit.
Project diagnostics
Practical boundaries
Quantity is not mix designThis calculator does not choose strength, slump, air content, aggregate, admixtures or water-cement ratio.
Supplier / engineerBag yields are product-specificReference presets are useful comparisons, but high-yield, lightweight and specialty products can differ substantially.
Check labelTruck “loads” are capacity mathActual truck size, minimum order, short-load fees, delivery windows and partial loads are supplier-specific.
Confirm supplieri
Do not add extra mix water just to make a bagged mix easier to place.Use the product’s water instructions. Quantity calculations cannot determine safe water content or structural suitability.