How Much Limestone Screenings for a 20x30 Patio?
A 20 by 30 foot patio is 600 square feet. How much limestone screenings for a 20x30 patio depends on depth: at 3 inches it is about 5.56 cubic yards or 7.8 tons. Suppliers usually sell by the ton, so the tonnage is the number to give them.
Volume and tonnage calculator →The math for a 20x30 patio
- Area: 20 × 30 = 600 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic feet: 600 × 0.250 = 150.0 cu ft.
- Cubic yards: ÷ 27 = 5.56 yd³.
- Tons: × 1.4 = 7.8 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 | 1.85 | 2.6 | 2.9 |
| 2 in | 3.70 | 5.2 | 5.7 |
| 3 in | 5.56 | 7.8 | 8.6 |
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. Ask your supplier for their own tons-per-yard figure, since stone source and moisture shift it.
Preparing the patio
Remove sod, level the area with a slight slope away from the house, and lay landscape fabric if weeds are a concern. Edging keeps loose material inside the patio footprint. For foot traffic and furniture, 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. 8.6 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 this size bulk delivery is usually the practical choice.
- Where it drops. Have the truck dump as close to the patio as firm ground allows.
When to choose limestone screenings
Good uses:
- 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 10x20 area at 3 inches takes about 2.6 tons.
- Weight used here: about 1.4 tons per cubic yard.
Common estimating mistakes
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- 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 tons of limestone screenings for a 20x30 patio?
About 7.8 tons at 3 inches deep, or 8.6 tons with 10 percent extra.
How many cubic yards is a 20x30 patio at 3 inches?
About 5.56 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 patio?
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 20x30?
600 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
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