How Much Concrete for a 16x24 Patio?
A 16 by 24 foot patio is 384 square feet. How much concrete for a 16x24 patio at the common 4-inch thickness: about 4.74 cubic yards. Most people order 5.25 yards to cover waste and an uneven base.
Concrete calculator →The math for a 16x24 patio
- Area: 16 ft × 24 ft = 384 sq ft.
- Thickness in feet: 4 in ÷ 12 = 0.333 ft.
- Volume: 384 × 0.333 = 128.0 cubic feet.
- Cubic yards: 128.0 ÷ 27 = 4.74 yd³.
- With 10% extra: 5.21 yd³.
The concrete calculator runs the same steps for any size and thickness.
Related: How Much Concrete for a 16x24 Slab?
Concrete for a 16x24 patio by thickness
| Thickness | Cubic feet | Cubic yards | Yards +10% | 80 lb bags | 60 lb bags |
|---|---|---|---|---|---|
| 4 in | 128.0 | 4.74 | 5.21 | 214 | 285 |
| 5 in | 160.0 | 5.93 | 6.52 | 267 | 356 |
| 6 in | 192.0 | 7.11 | 7.82 | 320 | 427 |
Bag counts assume about 0.60 cubic feet per 80 lb bag and 0.45 per 60 lb bag, rounded up.
Choosing the thickness
Four inches is standard for a patio that sees foot traffic and furniture. Slope it about 1/8 to 1/4 inch per foot away from the house so rain runs off, and go thicker under a hot tub or outdoor kitchen.
Related: How Much Gravel for a 16x24 Patio?
Ordering ready-mix
Ready-mix is priced and batched by the cubic yard (27 cubic feet). Plants commonly add a small-load fee when an order is under a set minimum, so ask about it when you call. Ordering a little extra costs far less than a second truck.
Getting the ground ready
Under the slab, most residential pours sit on about 4 inches of compacted gravel. The base spreads the load, drains water away and keeps the patio from cracking as the soil freezes and thaws. Compact the base in thin lifts, and dampen it just before the pour so it does not pull water out of the mix.
Joints, mesh and rebar
Cut or tool control joints so the slab cracks where you want it to. A common rule is spacing them, in feet, at no more than two to three times the slab thickness in inches, so about 10 feet apart for a 4-inch slab, and about a quarter of the slab depth deep.
Questions people ask
How many yards of concrete for a 16x24 patio at 4 inches?
About 4.74 cubic yards, or 5.21 with 10 percent extra.
How many yards for a 16x24 patio at 6 inches?
About 7.11 cubic yards.
How many 80 lb bags for a 16x24 patio?
About 214 bags at 4 inches thick, before any waste allowance.
How many square feet is a 16x24 patio?
384 square feet.
How many 80 lb bags make a cubic yard?
About 45. Each 80 lb bag yields roughly 0.6 cubic feet, and a cubic yard is 27 cubic feet.
How thick should the base under the slab be?
About 4 inches of compacted gravel is common for residential slabs, more on soft or poorly drained soil.
Related guides
- How Much Area Does a Yard of Concrete Cover?
- How Many Bags of Concrete in a Yard? 40, 60, 80 lb
- Gravel Base Under a Concrete Slab: Depth and Tons
- How Many Yards in a Concrete Truck? Mixer Sizes
- Concrete Short Load Fee: What It Is and How to Cut It
- 60 lb vs 80 lb Concrete Bags: Yield, Count, and Cost
- Rebar vs Wire Mesh in a Slab: Which One to Use
- Cost to Pour a Concrete Slab: Per Square Foot
- How Much Concrete for a 16x16 Patio?
- How Much Concrete for a 16x20 Patio?
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