Concrete Calculator
Estimate concrete volume and bag counts for common shapes.
Enter all dimensions in feet (e.g., 6 inches = 0.5 ft).
Concrete Estimate
Cubic Feet-
Cubic Yards-
Cubic Meters-
40 lb Bags-
60 lb Bags-
80 lb Bags-
About Concrete Calculator
What is a Concrete Calculator?
A concrete calculator estimates the volume of concrete needed for construction projects like slabs, footings, and columns.
How to Use
Select the shape tab, enter dimensions in feet, and click Calculate Volume to see cubic yards and bag requirements.
FAQ
How many bags do I need?
Bag counts are based on standard yields: 40 lb = 0.3 ft³, 60 lb = 0.45 ft³, 80 lb = 0.6 ft³.
Should I order extra concrete?
It is recommended to add 5-10% extra to account for spillage and variations in formwork.
Can I use metric units?
Enter dimensions in feet; the calculator also shows the volume in cubic meters for reference.