How Many Bags of Concrete for a 10x10 Patio? (2026 Guide)
A 10×10 ft (100 sq ft) patio slab at 4 in thick needs about 33.3 cu ft of concrete — 56 bags of 80-lb or 75 bags of 60-lb mix. At 3.5 in thick it's about 49 bags of 80-lb.
How many bags of concrete for a 10x10 patio
A 10×10 ft patio is 100 sq ft, and the bag count depends entirely on how thick you pour it. At the standard 4 in thickness for a walk-on patio you need about 33.3 cu ft of concrete — 56 bags of 80-lb or 75 bags of 60-lb mix. Here's the full breakdown across the common patio thicknesses.
| Thickness | Concrete (cu ft) | 80-lb bags | 60-lb bags |
|---|---|---|---|
| 3.5 in | 29.17 | 49 | 65 |
| 4 in | 33.33 | 56 | 75 |
| 5 in | 41.67 | 70 | 93 |
| 6 in | 50 | 84 | 112 |
The table assumes an 80-lb bag covers about 0.6 cu ft and a 60-lb bag covers about 0.45 cu ft. Bag counts are always rounded up to the next whole bag.
The math, step by step
Multiply the surface area by the thickness in feet, then divide by how much concrete one bag makes. A 10×10 patio is 100 sq ft, and 4 in is 4 ÷ 12 = 0.333 ft.
- Volume: 100 sq ft × 0.333 ft = 33.3 cu ft
- 80-lb bags: 33.3 ÷ 0.6 = 55.6, rounded up to 56 bags
- 60-lb bags: 33.3 ÷ 0.45 = 74.1, rounded up to 75 bags
That works out to about 0.56 bags of 80-lb per square foot at 4 in — for a per-square-foot rule of thumb, see how many bags of concrete per square foot.
Bags or a truck? You're right at the tipping point
At 4 in thick, a 10×10 patio is about 1.23 cubic yards (33.3 cu ft ÷ 27). That's right where a small ready-mix truck starts to make sense — most mini-mix and short-load deliveries begin around 1 yard. Carrying and mixing 56–75 bags is a full day of work, so price out delivered concrete before you commit. The volume is the same 1.23 cubic yards as a 10x10 slab — see how much concrete for a 10x10 slab.
Before you pour
- Compact the base first — 4 in of gravel or sand, tamped and leveled, keeps the slab from settling and cracking.
- Set the forms and a slope — pitch the top about 1/8–1/4 in per foot so water runs away from the house.
- Plan control joints — score the surface every 8–10 ft (or a simple cross cut on a 10x10) so cracks follow the grooves instead of wandering.
- Order 10% extra — odd forms, spillage and a low spot always eat into the total.
Working on a smaller pad instead? See how many bags of concrete for an 8x8 slab for the same math at a smaller scale.
FAQ
How many bags of concrete for a 10x10 patio at 4 inches?
56 bags of 80-lb mix, or 75 bags of 60-lb mix — about 33.3 cu ft of concrete for a 100 sq ft patio poured 4 in thick.
Should I use bags or a truck for a 10x10 patio?
A 10x10 patio at 4 in thick is about 1.2 cubic yards, right at the point where a small ready-mix truck becomes an option. 56–75 bags is doable by hand but is a full day of mixing, so compare delivered cost against the bag total.
How thick should a 10x10 patio be?
For a walk-on patio, 3.5–4 in is standard. Go thicker (5–6 in) only if the pad will support something heavy like a hot tub or a vehicle.
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