Concrete Calculator: Slabs, Footings & Bags
Calculate the exact amount of concrete needed for your project. Get cubic yard estimates plus the number of 60lb and 80lb pre-mixed bags required for slabs, driveways, footings, and more.
Note: This is an estimate. We recommend adding 5-10% extra to account for waste, spillage, and uneven surfaces. Always confirm with your material supplier.
Concrete Project Essentials
Proper base preparation with compacted gravel and level forms is crucial for a successful concrete pour.
Use rebar or wire mesh for structural integrity, especially in driveways and load-bearing applications.
Work quickly once mixing begins. Concrete starts setting within 30-60 minutes depending on conditions.
Keep concrete moist for proper curing. Cover with plastic or use curing compound for best results.
Recommended Concrete Depths
Understanding Concrete Strength (PSI)
2500-3000 PSI
Residential sidewalks, patios, and non-structural applications
3500-4000 PSI
Driveways, garage floors, and most residential structural work
4500+ PSI
Commercial applications, heavy-duty industrial floors