Bags of Sand for a 16x18 Patio
How many bags of sand for a 16x18 patio: at 2 inches deep you need about 48.0 cubic feet, which is 96 bags of the common 0.5 cubic foot size. If your store sells sand in 50-pound bags instead, figure about 96 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 | 24.0 | 48 | 48 |
| 2 in | 48.0 | 96 | 96 |
| 3 in | 72.0 | 144 | 144 |
| 4 in | 96.0 | 192 | 192 |
How to figure it
- Area: 16 × 18 = 288 sq ft.
- Volume: 288 × (2 ÷ 12) = 48.0 cu ft.
- Bags: 48.0 ÷ 0.5 = 96 bags (round up).
Bags or bulk?
A cubic yard is 27 cubic feet, so 48.0 cubic feet is 1.78 yards, about 2.4 tons. At this size, a bulk delivery usually beats a cart full of bags once you count trips. Compare the bag price × 96 against a bulk quote for 2.6 tons delivered.
About sand
For paver bedding, concrete sand (coarse, washed) is the usual pick. Mason sand is finer and used in mortar and play areas.
Laying it down 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
Best suited to:
- 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 14x28 area at 4 inches takes about 6.5 tons.
- Weight used here: about 1.35 tons per cubic yard.
Common estimating mistakes
- 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.
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
Questions people ask
How many bags of sand for a 16x18 patio?
About 96 bags of 0.5 cubic feet at 2 inches deep.
How many 50 lb bags of sand for 16x18?
About 96 bags at 2 inches.
How many 0.5 cubic foot bags are in a cubic yard?
54 bags.
How many cubic feet is a 16x18 patio at 2 inches?
About 48.0 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 16x14 Patio
- Bags of Sand for a 16x16 Patio
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