Concrete Calculator
Estimate concrete volume for slabs, footings, and columns — cubic yards, cubic meters, 60 lb bags.
How to Use
- Pick pour type.
- Enter dimensions in feet (or inches for thickness).
- Yields cubic yards, cubic meters, and bag counts.
Pour
Volume
Formulas
Slab / footing
V = L × W × T (ft³)
Column
V = π · (d/2)² · h
ft³ → yd³
÷ 27
Bags
60 lb bag ≈ 0.45 ft³ · 80 lb bag ≈ 0.60 ft³
Frequently Asked Questions
How much waste to add?
Order 10% over your calculation — accounts for spillage, uneven subgrade, and over-excavation.
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