How Much Limestone Screenings for a 4x20 Walkway?
How much limestone screenings for a 4x20 walkway is a quick volume problem. 80 square feet at 3 inches comes to 0.74 cubic yards. Limestone screenings usually weighs about 1.3 to 1.5 tons per cubic yard, so plan on roughly 1.0 tons.
Volume and tonnage calculator →The math for a 4x20 walkway
- Area: 4 × 20 = 80 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic feet: 80 × 0.250 = 20.0 cu ft.
- Cubic yards: ÷ 27 = 0.74 yd³.
- Tons: × 1.4 = 1.0 tons.
The volume and tonnage calculator does this for any size.
Limestone screenings needed by depth
| Depth | Cubic yards | Tons (approx.) | Tons +10% |
|---|---|---|---|
| 1 in | 0.25 | 0.3 | 0.4 |
| 2 in | 0.49 | 0.7 | 0.8 |
| 3 in | 0.74 | 1.0 | 1.1 |
About limestone screenings
Screenings hold moisture and can crust over. Use them in thin layers over a compacted stone base instead of as a thick layer on their own. Ask your supplier for their own tons-per-yard figure, since stone source and moisture shift it.
Preparing the walkway
Dig the path a few inches below grade, compact the bottom, add fabric if needed and install edging on both sides so the material stays on the walk. For foot traffic, the depths in the table above are a reasonable starting range.
Ordering tips
- Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
- Delivery size. 1.1 tons fits in a single typical dump truck load; small loads may carry a delivery fee. See how many tons of gravel in a dump truck.
- Bulk vs bags. At about 1.0 tons this job is small enough that bagged material could work; a 0.5 cubic foot bag holds about 1/54 of a yard, so compare the bag count with a bulk minimum.
- Where it drops. Have the truck dump as close to the walkway as firm ground allows.
Where limestone screenings fits
Works well for:
- Paver and flagstone setting beds
- Firm walking paths
- Top-dressing a compacted stone base
Less suited to:
- 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 15x30 area at 2 inches takes about 3.9 tons.
- Weight used here: about 1.4 tons per cubic yard.
Where estimates go wrong
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- 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 tons of limestone screenings for a 4x20 walkway?
About 1.0 tons at 3 inches deep, or 1.1 tons with 10 percent extra.
How many cubic yards is a 4x20 walkway at 3 inches?
About 0.74 cubic yards.
How much does a cubic yard of limestone screenings weigh?
Usually around 1.3 to 1.5 tons, depending on stone size, fines and moisture.
How deep should limestone screenings be for a walkway?
The table above shows 1 to 3 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.
How many square feet is 4x20?
80 square feet.
Related guides
- #10 Stone (Stone Dust): Size, Uses and How Many Tons
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- How Much Does a Ton of Gravel Cover? Depth Chart
- How Much Limestone Screenings for a 4x10 Walkway?
- How Much Limestone Screenings for a 4x15 Walkway?
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