How much concrete for a 20 ft × 20 ft?
A 20 ft × 20 ft concrete project is pre-filled below. Adjust any value to match your exact job.
Your project
Standard size shown by default. Change any value — the answer recomputes instantly.
You need
5.28cubic yards (ready-mix)
Exact need: 4.94 cubic yards (ready-mix) · plus 7% waste allowance
Material cost
$660–$871.2
Installed (US avg)
$2,190–$2,941
Shopping list
| ITEM | QTY | PRICE RANGE |
|---|---|---|
| cubic yards (ready-mix) | 5.28 | $660–$871.2 |
| Estimated material total | $660–$871.2 |
Alternative buy formats
- 238 × 80 lb bags — $1,309–$1,904
- 318 × 60 lb bags — $1,431–$2,226
20 ft × 20 ft at different depths
| Depth | You need | Buy (with waste) | Material cost |
|---|---|---|---|
| 1″ | 1.23 cubic yards (ready-mix) | 1.32 cubic yards (ready-mix) | $165 – $217.8 |
| 2″ | 2.47 cubic yards (ready-mix) | 2.64 cubic yards (ready-mix) | $330 – $435.6 |
| 3″ | 3.7 cubic yards (ready-mix) | 3.96 cubic yards (ready-mix) | $495 – $653.4 |
| 4″ | 4.94 cubic yards (ready-mix) | 5.28 cubic yards (ready-mix) | $660 – $871.2 |
| 6″ | 7.41 cubic yards (ready-mix) | 7.93 cubic yards (ready-mix) | $991.25 – $1,308.45 |