Pour your concrete project perfectly.
Whether you are pouring a driveway, patio, or fence post footings, calculate your required volume and get the exact number of premixed bags needed.
Enter Project Dimensions
Project Diagram
Total Volume
Enter dimensions above
Estimated Weight
Based on Concrete density (2 t/yd³)
Number of 2 cu ft bags
— bags
Recommended Depths for Concrete
| Project / Use Case | Recommended Depth |
|---|---|
| Driveway / Heavy Traffic | 5–6 inches |
| Sidewalk / Patio | 4 inches (standard) |
| Shed Floor / Base | 4 inches |
| Footings / Post Holes | 12–36 inches |
How to Calculate Concrete Volume
Most landscaping suppliers sell concrete by the cubic yard. To convert your project area to cubic yards, use this formula:
Our calculator also multiplies your cubic yard result by 2 tons/yd³ (the standard density for concrete) to show estimated weight — essential if you are hauling the material yourself or need delivery pricing.
Pro Tips for Concrete Projects
A standard 4-inch concrete slab requires gravel sub-base of at least 4 inches and steel mesh or rebar reinforcement for durability.
Always add 10% extra concrete to your order to account for spillage, sub-grade unevenness, and forms bowing.
Keep concrete moist for at least 3 to 7 days after pouring to ensure it cures to its maximum strength.