Concrete Calculator
Estimate concrete volume for slabs, footings, and columns in cubic yards, cubic metres, and cubic feet.
Concrete Needed
This calculator auto-updates when values change.
Total volume
2.33 cu yd
Cubic metres
1.78 m³
Cubic feet
63 ft³
Disclaimer: This property and construction calculator provides an estimate only. Actual material requirements can vary based on site conditions, product specifications, installation method, waste, and local building requirements. Confirm quantities with your contractor or supplier before ordering.
About This Concrete Calculator
This concrete calculator estimates how much concrete you need for common property and construction projects, including slabs, footings, and columns.
It includes a waste allowance so you can account for spills, uneven subgrades, and small measurement differences before ordering materials.
How to Use This Calculator
- 1
Choose the project type
Select slab, footing, or column depending on the shape you need to calculate.
- 2
Enter the dimensions
Add length, width, thickness, diameter, or height as requested by the selected mode.
- 3
Set waste allowance
Use 5-10% for many jobs, or increase it for uneven sites and complex pours.
- 4
Review volume
Check cubic yards, cubic metres, and cubic feet before ordering concrete.
Frequently Asked Questions
How do you calculate concrete for a slab?v
Multiply length by width by thickness to get cubic feet, then divide by 27 to convert to cubic yards.
Should I order extra concrete?v
Yes. A 5-10% waste allowance is common for spills, uneven ground, and small measurement errors.
Does this replace a contractor estimate?v
No. It is a planning estimate. Confirm requirements with your supplier or contractor before ordering.