Garage slab cost planner
Build a working estimate from local rates, then confirm foundation, edge, reinforcement, vapor-barrier, and drainage scope.
Free calculator
Concrete slab calculator
Enter finished slab dimensions. Waste is added after the geometric volume is calculated.
Concrete volume7.82 cu yd
Volume in cubic feet211.20 cu ft
80 lb bags352 bags
60 lb bags470 bags
Concrete material cost
Enter the price per cubic yard from your local supplier quote. The calculator does not assume a national price.
Concrete materialEnter your quoted price
Your working total$0.00
Formula: length × width × thickness, converted to cubic yards, plus waste. Cost outputs use only the prices you enter; taxes, permits, and contractor markup are not assumed.
What can make garage slab quotes differ?
- Independent slab versus engineered foundation, footings, or thickened edges.
- Reinforcement, anchor requirements, compacted base, and vapor barrier.
- Floor drains, finish, curing, access, pumping, and short-load charges.
- Permit and engineering work that may sit outside the concrete quote.