Concrete slab cost calculator and planning guide
Use your own local rates to build a working slab estimate, then compare every quote on the same scope.
Free calculator
Concrete slab calculator
Enter finished slab dimensions. Waste is added after the geometric volume is calculated.
Concrete volume5.43 cu yd
Volume in cubic feet146.67 cu ft
80 lb bags245 bags
60 lb bags326 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.
Why two quotes for the same slab can differ sharply
The concrete volume may be identical while site conditions and scope are not. Demolition, base depth, reinforcement, slab thickness, truck access or pumping, finish, and curing can change the work far more than the dimensions alone.
Printable quote comparison
| Condition | Quote A | Quote B |
|---|---|---|
| Demolition and disposal | ________ | ________ |
| Compacted base | ________ | ________ |
| Rebar or mesh | ________ | ________ |
| Slab thickness | ________ | ________ |
| Pumping / short-load fee | ________ | ________ |
| Finish and curing | ________ | ________ |