Construction
Concrete Calculator: Volume Needed
Calculate concrete for slabs, footings, columns.
Order the right amount of concrete.
Volume
Slabs: L×W×D. Columns: π×r²×h. Add 5-10% waste.
Common
- Driveway: 4" thick
- Patio: 4" (6" for hot tubs)
- Footings: below frost line
Ordering
Ready-mix by cubic yard. 1yd covers ~81sqft at 4".
Frequently Asked Questions
10x10 slab?
10×10×4" = 1.23yd³. Order 1.35 (10% extra).
Concrete vs cement?
Cement is ingredient. Concrete = cement + water + aggregate.
Slab thickness?
4" standard. 4-6" driveway. 6" garage. 8"+ heavy.