How Much Crushed Stone for a 10x20 Patio?
A 10 by 20 foot patio is 200 square feet. How much crushed stone for a 10x20 patio depends on depth: at 3 inches it is about 1.85 cubic yards or 2.6 tons. Suppliers usually sell by the ton, so the tonnage is the number to give them.
Volume and tonnage calculator →The math for a 10x20 patio
- Area: 10 × 20 = 200 sq ft.
- Depth in feet: 3 ÷ 12 = 0.250 ft.
- Cubic feet: 200 × 0.250 = 50.0 cu ft.
- Cubic yards: ÷ 27 = 1.85 yd³.
- Tons: × 1.4 = 2.6 tons.
The volume and tonnage calculator does this for any size.
Crushed stone needed by depth
| Depth | Cubic yards | Tons (approx.) | Tons +10% |
|---|---|---|---|
| 2 in | 1.23 | 1.7 | 1.9 |
| 3 in | 1.85 | 2.6 | 2.9 |
| 4 in | 2.47 | 3.5 | 3.8 |
| 6 in | 3.70 | 5.2 | 5.7 |
About crushed stone
Most quarries sell crushed stone by a size number or a screen size. Clean crushed stone drains well; stone with fines packs harder but sheds water more slowly. If the yard sells by the cubic yard instead of the ton, use the cubic-yard column directly.
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. Since the patio carries foot traffic and furniture, a little extra depth is cheap insurance.
Ordering tips
- Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
- Delivery size. 2.9 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.
Where crushed stone fits
Works well for:
- Driveway top courses and parking pads
- Shed and hot tub bases
- Backfill behind walls when a clean size is used
Less suited to:
- Barefoot areas, since angular stone is rough
- Play areas
- Places that need a smooth rolling surface for wheels
Quick reference numbers
- Per inch over 100 sq ft: about 0.43 tons of crushed stone (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.3 tons.
- Another size for comparison: a 8x16 area at 4 inches takes about 2.2 tons.
- Weight used here: about 1.4 tons per cubic yard.
Common estimating mistakes
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- 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.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
Questions people ask
How many tons of crushed stone for a 10x20 patio?
About 2.6 tons at 3 inches deep, or 2.9 tons with 10 percent extra.
How many cubic yards is a 10x20 patio at 3 inches?
About 1.85 cubic yards.
How much does a cubic yard of crushed stone weigh?
Usually around 1.35 to 1.5 tons, depending on stone size, fines and moisture.
How deep should crushed stone be for a patio?
The table above shows 2 to 6 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.
How many square feet is 10x20?
200 square feet.
Related guides
- How Much Does a Ton of Crushed Stone Cover?
- 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 Crushed Stone for a 10x16 Patio?
- How Much Crushed Stone for a 10x18 Patio?
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