Concrete Estimate

Cubic Feet—

Cubic Yards—

Weight—

60-lb Bags Needed—

Cost (60-lb bags)—

80-lb Bags Needed—

Cost (80-lb bags)—

Ready-Mix Cost—

Recommendation—

Concrete Thickness Guide

Application	Thickness	Notes
Sidewalk / patio	4 inches	Standard residential use
Driveway (cars)	6 inches	Add rebar grid
Heavy equipment / RV pad	8 inches	Use 3/4" aggregate mix
Fence post footing	—	Hole diameter = 3× post, depth = 1/3 post ht

Always use a gravel base — 4–6 inches of compacted gravel under any slab.
Ready-mix is cost-effective at 1+ cubic yards ($150–200 delivery + per-yard cost). Bags are better for small jobs.
Rent a mixer for projects over 20 bags — hand-mixing that much is exhausting and affects quality.
Concrete sets in 24–48 hours but cures to full strength in 28 days. Keep moist for 7 days for best results.
#4 rebar on 12" grid is standard for slabs. Wire mesh is an alternative for thinner pads.