Bags of Sand for a 16x20 Patio
How many bags of sand for a 16x20 patio: at 2 inches deep you need about 53.3 cubic feet, which is 107 bags of the common 0.5 cubic foot size. If your store sells sand in 50-pound bags instead, figure about 107 bags, since sand weighs roughly 100 pounds per cubic foot.
Volume and tonnage calculator →Bag count by depth
| Depth | Cubic feet | 0.5 cu ft bags | 50 lb bags (approx.) |
|---|---|---|---|
| 1 in | 26.7 | 54 | 54 |
| 2 in | 53.3 | 107 | 107 |
| 3 in | 80.0 | 160 | 160 |
| 4 in | 106.7 | 214 | 214 |
How to figure it
- Area: 16 × 20 = 320 sq ft.
- Volume: 320 × (2 ÷ 12) = 53.3 cu ft.
- Bags: 53.3 ÷ 0.5 = 107 bags (round up).
Bags or bulk?
A cubic yard is 27 cubic feet, so 53.3 cubic feet is 1.98 yards, about 2.7 tons. At this size, a bulk delivery usually beats a cart full of bags once you count trips. Compare the bag price × 107 against a bulk quote for 2.9 tons delivered.
About sand
Sand weight changes a lot with moisture. Damp sand can weigh noticeably more per yard than dry sand, so a ton of wet sand covers less area than the same ton dry.
Install tips for a patio
- Dig and level. Remove sod and set the base slightly below the surrounding grade.
- Edge it. Steel, plastic or stone edging keeps material in place.
- Spread in layers. Rake to depth, then tamp or wet and compact.
- Buy a few extra. Grab 5 to 10 percent more bags for settling and touch-ups.
The volume and tonnage calculator handles other sizes and depths.
When to choose sand
Good uses:
- Paver and flagstone bedding
- Leveling under above-ground pools (with the right product)
- Filling joints and backfilling pipe
Less suited to:
- Driveway bases, since sand shifts under load
- Steep areas exposed to runoff
- Thick layers under pavers, which settle unevenly
Quick reference numbers
- Per inch over 100 sq ft: about 0.42 tons of sand (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.2 tons.
- Another size for comparison: a 8x16 area at 4 inches takes about 2.1 tons.
- Weight used here: about 1.35 tons per cubic yard.
Mistakes that throw off the order
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
Questions people ask
How many bags of sand for a 16x20 patio?
About 107 bags of 0.5 cubic feet at 2 inches deep.
How many 50 lb bags of sand for 16x20?
About 107 bags at 2 inches.
How many 0.5 cubic foot bags are in a cubic yard?
54 bags.
How many cubic feet is a 16x20 patio at 2 inches?
About 53.3 cubic feet.
When does bulk make more sense?
Usually once the job passes about a cubic yard, or when you would need more than a few car trips.
Related guides
- How Much Does a Ton of Sand Cover?
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Much Does a Ton of Gravel Cover? Depth Chart
- Bags of Sand for a 16x16 Patio
- Bags of Sand for a 16x18 Patio
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