How Much Sand Do I Need? Calculator & Guide
A 200 sq ft paver patio needs about 0.62 cubic yards of coarse bedding sand (1-inch layer), costing $12–$31 for material. Use ASTM C-33 bedding sand for pavers, play sand for sandboxes, and mason sand for pool bases.
Sand is one of those materials where getting the quantity wrong is either expensive (too much) or annoying (too little, plus a second delivery fee). Whether you're laying paver bedding, filling a sandbox, mixing mortar, or leveling a pool base, the formula is the same — the depth and sand type change.
This guide covers how to calculate sand for every common project, what type of sand to use, realistic costs, and how to order the right amount. For a quick answer, use our free sand calculator.
Sand Calculator
Enter your project dimensions below. Set the depth based on your project type (see the depth guide further down).
Enter your dimensions above to calculate sand needed.
💡 1 cubic yard of sand covers approximately 162 sq ft at 2 inches deep
The Formula
Sand is sold by the cubic yard. Here's the formula:
Length (ft) × Width (ft) × Depth (in) ÷ 324 = Cubic Yards
The 324 converts feet and inches into cubic yards in one step (27 cubic feet per yard × 12 inches per foot = 324). One cubic yard of sand weighs roughly 2,500–3,000 lbs (1.25–1.5 tons) depending on moisture content.
How Much Sand Do I Need?
The amount depends on your project. Here's a depth guide:
| Project | Recommended Depth | Sand Type |
|---|---|---|
| Paver bedding layer | 1 inch | Coarse / ASTM C-33 bedding sand |
| Paver joint fill | N/A (fills gaps) | Polymeric sand |
| Sandbox | 4–6 inches | Washed play sand |
| Above-ground pool base | 2–3 inches | Mason sand (fine, smooth) |
| Leveling / grading | 1–2 inches | All-purpose or mason sand |
| Pipe bedding | 4–6 inches | Coarse bedding sand |
| Concrete / mortar mixing | Varies | Masonry sand or sharp sand |
Sand for Paver Bedding
The most common reason homeowners buy bulk sand is for paver bedding — the 1-inch layer between your compacted gravel base and the pavers themselves. This layer needs to be coarse, angular sand (ASTM C-33 spec), not fine play sand or mason sand.
For a 1-inch bedding layer, the math is simple:
Square footage ÷ 324 = Cubic Yards of sand
Paver Bedding Sand by Patio Size
| Patio Size | Bedding Sand (1") | Weight (approx.) | Est. Cost |
|---|---|---|---|
| 100 sq ft (10×10) | 0.31 yd³ | ~775 lbs | $6–$16 |
| 200 sq ft (10×20) | 0.62 yd³ | ~1,550 lbs | $12–$31 |
| 300 sq ft (15×20) | 0.93 yd³ | ~2,325 lbs | $19–$47 |
| 500 sq ft (20×25) | 1.54 yd³ | ~3,850 lbs | $31–$77 |
Don't forget you also need a 4–6 inch compacted gravel base under the sand. Use our gravel calculator for the base layer, and our paver calculator for a complete paver material list.
Sand for a Sandbox
Sandboxes should be filled 4–6 inches deep with washed, non-toxic play sand. Most play sand comes in 50-lb bags from home improvement stores, though bulk is cheaper for larger sandboxes.
Sandbox Sand by Size
| Sandbox Size | Cubic Yards (6" deep) | 50-lb Bags | Est. Cost |
|---|---|---|---|
| 4×4 ft | 0.30 yd³ | ~8 bags | $32–$48 |
| 5×5 ft | 0.46 yd³ | ~12 bags | $48–$72 |
| 6×6 ft | 0.67 yd³ | ~18 bags | $72–$108 |
| 8×8 ft | 1.19 yd³ | ~32 bags | $128–$192 |
For anything larger than 5×5 ft, consider bulk delivery — it's significantly cheaper per cubic yard than bagged. Ask your supplier for washed natural play sand that meets ASTM F1292 standards for playground use.
Sand for Pool Base
Above-ground pools need a smooth, level base. Most pool manufacturers recommend 2–3 inches of fine mason sand under the pool liner. This cushions the liner, prevents rocks from poking through, and makes leveling easier.
For a round pool, use the formula:
π × (radius in ft)² × depth (in) ÷ 324 = Cubic Yards
Pool Base Sand by Pool Size
| Pool Diameter | Sand Needed (2" deep) | Weight (approx.) |
|---|---|---|
| 12 ft round | 0.70 yd³ | ~1,750 lbs |
| 15 ft round | 1.09 yd³ | ~2,725 lbs |
| 18 ft round | 1.57 yd³ | ~3,925 lbs |
| 24 ft round | 2.79 yd³ | ~6,975 lbs |
Always level the ground first before spreading sand. Use a long board and level to confirm the surface is within ½ inch across the entire area. An unlevel pool base creates uneven water pressure that can damage the pool wall.
Sand Cost Breakdown
Sand prices vary by type and whether you buy bulk or bagged.
| Sand Type | Bulk (per yd³) | Bagged (per 50 lbs) | Best For |
|---|---|---|---|
| Coarse bedding sand | $20–$40 | $4–$6 | Paver bedding, pipe bedding |
| Play sand | $25–$40 | $4–$6 | Sandboxes, play areas |
| Mason sand | $30–$50 | $5–$8 | Pool bases, mortar, leveling |
| Polymeric sand | N/A (sold in bags only) | $20–$30 | Paver joints |
Bulk delivery adds $50–$150 per load. Most suppliers have a 2–3 yard minimum for delivery. For anything under 1 cubic yard, bagged sand from a hardware store is usually more practical.
Bulk vs. Bagged Sand
The break-even point depends on how much you need. A cubic yard of sand equals roughly 27 bags of 50-lb sand.
| Amount | Bagged Cost | Bulk Cost (delivered) |
|---|---|---|
| 0.5 yd³ (~14 bags) | $56–$84 | Not practical (below minimums) |
| 1 yd³ (~27 bags) | $108–$162 | $70–$190 |
| 3 yd³ (~81 bags) | $324–$486 | $110–$270 |
How to Order (and Not Waste Money)
- Measure the area. For rectangles: length × width. For circles: π × radius². For irregular shapes, break into rectangles and add them up.
- Choose your depth from the table above.
- Add 10% extra. Ground is never perfectly level, and some sand gets lost during spreading and compaction.
- Use the right type. Bedding sand for pavers, play sand for sandboxes, mason sand for pools. Using the wrong type causes problems.
- Check delivery access. Bulk sand delivery needs a clear path at least 10 ft wide for the dump truck.
Common Mistakes
- Using play sand under pavers: Play sand is too fine and holds moisture. Pavers will shift and settle. Use coarse bedding sand (ASTM C-33).
- Making the bedding layer too thick: More than 1 inch of bedding sand under pavers causes settling. One inch is the industry standard.
- Skipping the gravel base:Sand alone won't support pavers. You need 4–6 inches of compacted gravel underneath. See our gravel base guide.
- Ordering exact amounts: Always round up. A second delivery fee costs more than an extra third of a yard.
- Not leveling before spreading: Sand follows the shape of the ground underneath. Grade and compact the sub-base first.
Related Calculators
Planning a bigger project? These tools can help:
- Sand Calculator — instant cubic yard and tonnage estimates for any sand project
- Gravel Calculator — for the gravel base under your sand layer
- Paver Calculator — paver counts, sand, and gravel for patios and walkways
- Concrete Calculator — for slabs and footings
- Gravel Base Calculator — how much gravel base for pavers, sheds, and slabs
- Paver Patio Cost Guide — full cost breakdown and planning tips
Ready to run the numbers?
Use our free calculators to get exact material quantities and cost estimates for your project.
Try the Calculators