How Much Concrete for a 14x20 Patio?
A 14 by 20 foot patio is 280 square feet. How much concrete for a 14x20 patio at the common 4-inch thickness: about 3.46 cubic yards. Most people order 4.00 yards to cover waste and an uneven base.
Concrete calculator →The math for a 14x20 patio
- Area: 14 ft × 20 ft = 280 sq ft.
- Thickness in feet: 4 in ÷ 12 = 0.333 ft.
- Volume: 280 × 0.333 = 93.3 cubic feet.
- Cubic yards: 93.3 ÷ 27 = 3.46 yd³.
- With 10% extra: 3.80 yd³.
The concrete calculator runs the same steps for any size and thickness.
Related: How Much Concrete for a 14x20 Driveway?
Concrete for a 14x20 patio by thickness
| Thickness | Cubic feet | Cubic yards | Yards +10% | 80 lb bags | 60 lb bags |
|---|---|---|---|---|---|
| 4 in | 93.3 | 3.46 | 3.80 | 156 | 208 |
| 5 in | 116.7 | 4.32 | 4.75 | 195 | 260 |
| 6 in | 140.0 | 5.19 | 5.70 | 234 | 312 |
Bag counts assume about 0.60 cubic feet per 80 lb bag and 0.45 per 60 lb bag, rounded up.
How thick to pour it
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 Concrete for a 14x20 Slab?
Truck or bags?
A cubic yard of concrete is 27 cubic feet and weighs roughly 4,000 pounds. Most ready-mix trucks carry up to about 9 to 10 yards, though local trucks and rules vary. If your total is under a yard or two, bagged mix or a short-load supplier may be cheaper.
Prep before the pour
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 8 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 14x20 patio at 4 inches?
About 3.46 cubic yards, or 3.80 with 10 percent extra.
How many yards for a 14x20 patio at 6 inches?
About 5.19 cubic yards.
How many 80 lb bags for a 14x20 patio?
About 156 bags at 4 inches thick, before any waste allowance.
How many square feet is a 14x20 patio?
280 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.
When is bagged concrete practical?
Usually for jobs under about a cubic yard. Beyond that, mixing dozens of bags by hand gets slow and batches may not blend well.
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 14x14 Patio?
- How Much Concrete for a 14x16 Patio?
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