10×20 Concrete Slab Cost
A 10×20 slab covers 200 square feet. Here's the concrete, bags and cost for 2026 — a common size for a single driveway strip.
Concrete (4", waste in)
2.72 yd³
123 × 80 lb bags
Materials (ready-mix)
$400 – $691
delivered, 4" slab
Installed by a pro
$1,100 – $2,400
4" slab, national average
10×20 slab cost calculator
Adjust thickness, waste or region — the cost updates live.
Waste & region
Order extra for spillage & uneven subgrade. 10% is typical.
Installed cost estimate
$1,100 – $2,400
200 sq ft · 2.72 yd³ concrete
Bags of concrete needed (rounded up)
123
80 lb
163
60 lb
196
50 lb
245
40 lb
- Ready-mix (delivered)
- $400 – $691
- Bagged mix (80 lb, DIY)
- $677 – $1,107
- Installed by a pro
- $1,100 – $2,400
Estimate only — not a quote. Bag counts are rounded up and include a 10% waste allowance.
10×20 slab cost by thickness
| Thickness | Concrete | 80 lb bags | Ready-mix | Installed |
|---|---|---|---|---|
| 4" | 2.72 yd³ | 123 | $400 – $691 | $1,100 – $2,400 |
| 5" | 3.4 yd³ | 153 | $484 – $820 | $1,250 – $2,550 |
| 6" | 4.07 yd³ | 184 | $569 – $949 | $1,400 – $2,700 |
Includes a 10% waste allowance; bag counts rounded up. National US averages, January 2026.
You'll also need
Sized for this exact slab — tap any item to open its calculator with your measurements already filled in.
10×20 concrete slab: what to expect
A 10×20 slab covers 200 square feet. At the standard 4" thickness it takes about 2.72 cubic yards of concrete once you allow 10% for waste, which is roughly 123 × 80 lb bags if you mix by hand. Stepping up to 6" — sensible if it'll carry a vehicle — raises that to about 4.07 cubic yards.
Budget around $1,100 – $2,400 to have a 4" slab this size poured and finished by a contractor, or roughly $400 – $691 in ready-mix if you're doing the labor yourself. On top of the concrete you'll need about 2.84 yd³ of gravel base and 14 sticks of rebar.
Compare nearby sizes
Planning something bigger or smaller? Jump straight to the cost for a nearby size.
Volumes use standard bag yields and a 10% waste allowance; costs are national US averages that vary by region, mix and finish. See our methodology for exactly how each figure is worked out, or check the reference sources: