Concrete Calculator

Ordering concrete is expensive—order too little and you'll pay emergency delivery fees; order too much and waste hundreds of dollars. Our Concrete Calculator helps you order exactly the right amount. Concrete costs $120-$200 per cubic yard delivered (2026 prices). Short-load fees add $50-$150 for orders under 4-5 yards. The calculator supports six shapes: Slab (rectangle/square) using volume = Length × Width × Thickness; Circular Slab using π × Radius² × Thickness; Footing using Length × Width × Depth; Column/Cylinder using π × Radius² × Height; Wall using Length × Height × Thickness; and Hole/Sonotube using π × Radius² × Depth. Bagged concrete yields: 40lb bag = 0.30 cu ft, 60lb = 0.45 cu ft, 80lb = 0.60 cu ft. Waste factors: simple slab 5-10%, complex shapes 10-15%, footings 10%, stairs 15-20%, post holes 20-25%. For projects over 1 cubic yard (10x10x4 inch slab), ready-mix delivered is cheaper. For under 1 yard, bagged concrete is more convenient despite higher per-yard cost.

Concrete Calculator is optimized for fast browser-based use, so you can test multiple scenarios in seconds.