How Much Sand Do I Need Under Pavers?
A 10×10 patio needs 0.31 cubic yards of bedding sand. Here's why 1 inch is the standard and what happens when you use too much.
1 inch. That's the standard sand bedding layer under pavers — not 2 inches, not "a nice thick layer." Exactly 1 inch, screeded flat and level.
For a 10×10 foot patio, that works out to 0.31 cubic yards, or about 0.42 tons, or 17 bags of 50-lb sand.
Why Exactly 1 Inch?
A 1-inch sand bed is thick enough to cushion the pavers and allow for minor leveling adjustments, but thin enough to stay stable under load. Here's what happens when people go thicker:
At 1.5–2 inches, the pavers start to settle unevenly. Foot traffic compresses the sand differently in different spots, and you end up with a wavy surface within a year. The pavers rock when you step on them.
At 2+ inches, it gets worse. The sand shifts laterally under the pavers, joints open up, and the whole patio starts to look like it's melting. You'll be pulling pavers and releveling within two seasons.
The gravel base underneath (4–6 inches of compacted aggregate) does the heavy lifting for drainage and structural support. The sand layer is just for final leveling and cushion.
Sand Needed for Common Patio Sizes
All at the standard 1-inch depth:
| Area (sq ft) | Cubic Yards | Tons | 50-lb Bags | |--------------|-------------|------|-----------| | 50 | 0.15 | 0.21 | 9 | | 100 | 0.31 | 0.42 | 17 | | 200 | 0.62 | 0.83 | 33 | | 500 | 1.54 | 2.08 | 84 |
The formula: area (sqft) × 1" ÷ 12 ÷ 27 = cubic yards. Multiply by 1.35 for tons, or divide cubic feet by 0.5 for 50-lb bags.
Which Sand to Use
For the bedding layer: concrete sand (ASTM C-33) or coarse washed sand. It's angular, compacts well, and drains properly. Some suppliers call it "bedding sand" or "paver sand." Do NOT use play sand, all-purpose sand, or mason sand for bedding — they're too fine and hold water.
For the joints between pavers: polymeric sand. This is a special sand with a binding agent that hardens when you wet it, locking the pavers together and preventing weed growth. Budget about 1 bag per 25–40 square feet depending on the joint width. A 100-square-foot patio needs 3–4 bags of polymeric sand.
Two Layers of Sand, Two Different Jobs
People sometimes confuse the bedding sand with joint sand or with the gravel base. Here's the full layer cake from bottom to top:
- Compacted subgrade (the dirt, tamped firm)
- Gravel base — 4–6 inches of crushed aggregate, compacted in 2-inch lifts
- Sand bedding — 1 inch of concrete sand, screeded level ← this is what we're calculating
- Pavers — set into the sand bed
- Joint sand — polymeric sand swept into the gaps between pavers
The gravel base is the expensive part. Use our gravel calculator for that layer — a 10×10 patio at 4 inches of gravel needs about 1.2 cubic yards of crushed stone.
Buying Tips
Once you need more than about 10 bags, buy in bulk from a landscape supply yard. Sand runs $25–$50 per ton in bulk. That 100-square-foot patio needs 0.42 tons — maybe $15–$20 in bulk. The same amount in 50-lb bags from Home Depot costs $70–$100. For larger patios, the savings are even more dramatic.
Have it delivered — sand is heavy, and even a half ton is tough to haul in a pickup without making a mess.
Use our sand calculator to get the exact quantity for your patio dimensions and depth.
Frequently Asked Questions
- How deep should the sand bed be under pavers?
- One inch of bedding sand is the standard for patio pavers. More than 1 inch causes pavers to shift and settle unevenly over time, since sand doesn't compact as firmly as gravel. The bedding sand goes on top of a 4–6 inch compacted gravel base — not directly on soil.
- What type of sand is best under pavers?
- Coarse concrete sand (also called sharp sand or builders sand) is the correct choice for paver bedding. It compacts well and drains quickly. Avoid fine masonry sand or play sand — they're too fine, wash out easily, and don't provide stable support. Polymeric sand is used to fill the joints between pavers after installation.
- Do I need a gravel base under pavers?
- Yes — always. The gravel base is more important than the sand layer. Use 4 inches of compacted crushed gravel (3/4-inch minus) for foot traffic patios, and 6 inches for driveways or any area with vehicle traffic. The gravel drains water away from below and provides a stable platform for the sand and pavers.
- How much sand do I need per square foot of pavers?
- At 1 inch deep, you need 0.083 cubic feet of sand per square foot of patio (1 inch ÷ 12 = 0.083 ft). For a 100 sq ft patio, that's 8.3 cubic feet — about 0.3 cubic yards or roughly 470 lbs. Always add 10% extra for screeding waste.
- Can I skip the gravel base and just use sand?
- No. Sand alone under pavers will erode, shift, and allow frost heave. The gravel base locks in place and provides drainage that prevents the freeze-thaw damage that destroys paver installations. A patio without a proper gravel base will look bad within a few years, especially in climates with wet winters.