How do I calculate yards of concrete? It's simple!
Measure your project dimensions, multiply them together, then divide by 27 to convert cubic feet
to cubic yards. Our calculator does this instantly for slabs, columns, footings, and stairs.
How to Calculate Concrete Yards
for a Slab
Formula: (Length × Width × Thickness ÷ 12) ÷ 27
Example: A 10ft × 12ft slab at 4 inches
thick = (10 × 12 × 4 ÷ 12) ÷ 27 = 1.48 cubic yards
How Do You Calculate Yards of
Concrete for Columns?
For round columns: (π × (Diameter ÷ 2 ÷ 12)² × Height) ÷ 27
For square columns: (Width × Depth × Height ÷ 1728) ÷ 27
Pro Tips for Calculating
Concrete Yards
- Always add 5-10% waste factor for spillage
- Convert all measurements to feet before calculating
- Round up to the nearest 0.5 cubic yards when ordering
- One cubic yard = 27 cubic feet