Calculate how much concrete you need for your project.
Enter the length, width, and depth of the area you need to fill with concrete.
Click "Calculate" to get the total volume in cubic meters and cubic yards, plus the estimated number of 60 lb and 80 lb premixed bags needed.
Use "Reset" to clear the values and calculate for a different area.
Volume: Volume = Length × Width × Depth
Convert cubic meters to cubic yards: yd³ = m³ × 1.30795
Bag estimates: A 60 lb bag yields about 0.45 ft³, an 80 lb bag yields about 0.60 ft³. One cubic yard = 27 cubic feet.
Example: A concrete slab 3 m long, 2 m wide, and 0.1 m deep.
Yes, it is recommended to order 5-10% extra to account for spillage, uneven surfaces, and settling.
Both contain premixed concrete; the 80 lb bag yields approximately 0.60 cubic feet per bag versus 0.45 cubic feet for the 60 lb bag.
A typical residential slab (patio, walkway) is 4 inches (0.1 m) thick. Driveways and garage floors are usually 5-6 inches thick.
This calculator is designed for rectangular areas. For circular pours, compute the area as pi x r-squared and multiply by depth.