Concrete Calculator
Estimate concrete volume for common shapes (slabs, walls, footings, columns) with optional bag and cost estimates. A concrete calculator estimates concrete volume for common shapes like slabs and footings. It can also approximate bags needed and cost if you enter a price per unit.
Options
Common is 5–10%.
%
Used for a rough cost estimate.
$
Results
Volume (ft³)73.33
Volume (yd³)2.716
80 lb bags (approx.)123
Conversion: 1 yd³ = 27 ft³. Bag yields vary by product—check your bag label.
Dimensions
Slab (rectangular)
ft
ft
in
How to use it
- Select a shape (slab, wall, footing, column).
- Enter dimensions and quantity, then choose units.
- Optionally add a waste percentage and price per yard/m³.
- Review volume and bag/cost estimates.
Key formulas
- Rectangular volume
- V = L × W × D
- Cylinder volume
- V = π × r² × h
- Cubic yards
- yd³ = ft³ / 27
FAQ
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Disclaimer
Estimates only. Confirm required volumes and structural specs with a professional for critical projects.