Concrete for a 10×10 ft slab
A 10 × 10 ft slab at 4 in deep needs 1.23 cubic yards of concrete — about 56 × 80 lb bags, roughly 2.50 tons and $203.70 of material. Fine-tune below.
Full breakdown
| Item | Value |
|---|---|
| Volume before waste | 33.3 ft³ |
| Volume with 5% waste | 35.0 ft³ |
| Cubic yards | 1.30 |
| Cubic metres | 0.99 |
| Cubic feet | 35.0 |
| Weight | 2.63 tons (5,250 lb) |
| Full dump-truck loads | 1 × 10 yd³ truck |
| 80 lb bags | 59 bags · $404.15 |
| 60 lb bags | 78 bags · $425.10 |
| Sq ft covered at 1 in deep | 420 |
| Sq ft covered at 3 in deep | 140 |
- Formula: length × width × depth, with depth converted from inches to feet (÷ 12), then × (1 + waste%).
- Concrete: Concrete is ordered by the cubic yard from a ready-mix plant, or mixed from 60 lb and 80 lb bags for small pours.
- Ready-mix plants almost always have a minimum charge — often 1 cubic yard — plus a short-load fee below about 3 yards, so a 0.5-yard pour can cost nearly as much as a 3-yard one.
- Prices are national averages for planning, not quotes. Confirm with a local supplier — delivery, short-load fees and tax are extra.
10 × 10 ft is 100 square feet. Spread 4 in deep, that is 33.3 cubic feet, or 1.23 cubic yards, of concrete. Expect to order around 2.50 tons.
The calculator above is pre-filled with these dimensions — change any field to see the numbers update. Concrete is ordered by the cubic yard from a ready-mix plant, or mixed from 60 lb and 80 lb bags for small pours.
Frequently asked questions
How many cubic yards of concrete for a 10×10 ft slab?
About 1.23 cubic yards at 4 in deep, which is 33.3 cubic feet or 2.50 tons. Add 5% waste if the ground is uneven.
How many bags is that?
56 × 80 lb bags, or 75 × 60 lb bags. Bagged is only worth it at this size if you cannot take a truck delivery.
What depth should a slab be?
4 in is the standard for concrete in this application. Ready-mix plants almost always have a minimum charge — often 1 cubic yard — plus a short-load fee below about 3 yards, so a 0.5-yard pour can cost nearly as much as a 3-yard one.