Bags of Limestone Screenings for a 3x40 Walkway
How many bags of limestone screenings for a 3x40 walkway: at 2 inches deep you need about 20.0 cubic feet, which is 40 bags of the common 0.5 cubic foot size. If your store sells limestone screenings in 50-pound bags instead, figure about 42 bags, since limestone screenings weighs roughly 104 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 | 10.0 | 20 | 21 |
| 2 in | 20.0 | 40 | 42 |
| 3 in | 30.0 | 60 | 63 |
| 4 in | 40.0 | 80 | 83 |
How to figure it
- Area: 3 × 40 = 120 sq ft.
- Volume: 120 × (2 ÷ 12) = 20.0 cu ft.
- Bags: 20.0 ÷ 0.5 = 40 bags (round up).
Bags or bulk?
A cubic yard is 27 cubic feet, so 20.0 cubic feet is 0.74 yards, about 1.0 tons. Under a yard, bags save a delivery fee and are easy to haul in a car or pickup. Compare the bag price × 40 against a bulk quote for 1.1 tons delivered.
About limestone screenings
Limestone screenings are the fine dust and chips left after crushing limestone. They pack very tight, which makes them a common setting bed for pavers and flagstone and a surface for paths.
Laying it down for a walkway
- 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.
Where limestone screenings fits
Good uses:
- Paver and flagstone setting beds
- Firm walking paths
- Top-dressing a compacted stone base
Poor fit for:
- Deep layers on their own
- Low spots that collect water
- Under heavy vehicle traffic without a base
Quick reference numbers
- Per inch over 100 sq ft: about 0.43 tons of limestone screenings (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.3 tons.
- Another size for comparison: a 20x25 area at 2 inches takes about 4.3 tons.
- Weight used here: about 1.4 tons per cubic yard.
Mistakes that throw off the order
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many bags of limestone screenings for a 3x40 walkway?
About 40 bags of 0.5 cubic feet at 2 inches deep.
How many 50 lb bags of limestone screenings for 3x40?
About 42 bags at 2 inches.
How many 0.5 cubic foot bags are in a cubic yard?
54 bags.
How many cubic feet is a 3x40 walkway at 2 inches?
About 20.0 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
- #10 Stone (Stone Dust): Size, Uses and How Many Tons
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Much Does a Ton of Gravel Cover? Depth Chart
- Bags of Limestone Screenings for a 3x25 Walkway
- Bags of Limestone Screenings for a 3x30 Walkway
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