Concrete Calculator › Cost by city › St. Louis, MO
Concrete Cost in St. Louis, MO
Concrete for a 20×20 ft (400 sq ft) 4-inch concrete slab in St. Louis, MO costs about $704 ($598–$809). Local 2026 price is around $142 per cuyd. Free calculator inside.
Estimated cost — a 20×20 ft (400 sq ft) 4-inch concrete slab
$704
Typical range $598 – $809 · about $142 per cuyd in St. Louis
Local unit price
$142
You need
4.94 cu yd
State factor
MO ×0.95
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Estimate your own St. Louis project
Prices in St. Louis, MO run about -5% versus the national average. Enter your dimensions — the calculator starts from the local $142 per cuyd rate; change it to your supplier's quote for an exact figure.
You need
4.94 cu yd
Estimated material cost $704
Area
400 sq ft
Volume
133.33 cu ft
80-lb bags
223
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Regional estimate = national average adjusted by a MO cost factor. Not a quote. Actual prices vary by site conditions, access, and supplier.