Sand Calculator

Sand density ~100 lbs/cu ft · 1 ton ≈ 20 cu ft · covers ~200 sq ft at 1" depth · Always add 10% for waste · Bulk sand $20–$55/ton · Never use fine play sand for paver bases

Estimates based on 2026 US average pricing from HomeAdvisor and landscape supplier data. Density per ASTM C33 coarse aggregate data. Always confirm current pricing with your local supplier.

How Does the Sand Calculator Work?

This calculator estimates tons and cubic yards of sand for any project — paver bases, playgrounds, concrete mixing, drainage, and fill. It uses a standard bulk sand density of approximately 100 lbs per cubic foot, consistent with ASTM C33 coarse aggregate specifications for concrete sand.

1. Enter your area length and width in feet. For irregular shapes, use our Square Footage Calculator first.
2. Enter the desired depth in inches — 1 inch for paver bedding, 4–6 inches for playground sand.
3. Get instant results — tons, cubic yards, cubic feet, and estimated cost range.

3 Worked Examples

Example 1 — Paver Patio Bedding Sand (20×15 ft, 1 Inch, Coarse Sand)

A 300 sq ft paver patio requiring 1 inch of coarse concrete bedding sand (ASTM C33) on a compacted gravel base. 10% waste factor.

Real-world note: The bedding sand is only one part of a complete paver base system. The ICPI standard paver installation requires: 6–8 inches of compacted gravel base, then 1 inch of coarse concrete bedding sand (screeded perfectly flat), then pavers, then polymeric joint sand swept into joints and activated with water. Do not add extra bedding sand to correct for an uneven gravel base — correct the base first. More than 1.5 inches of bedding sand allows pavers to rock and sink unevenly over time.

Example 2 — Playground Sand Fill (25×20 ft, 6 Inches, Play Sand)

A 500 sq ft residential play area requiring 6 inches of play sand for fall protection. 10% waste factor.

Real-world note: 6 inches of sand is the minimum CPSC-recommended depth for a playground with equipment up to 4 feet high. For equipment up to 6 feet high, CPSC recommends 9 inches — which would require 20.6 tons for this same area. Sand is less effective as a protective surface than engineered wood fiber or rubber mulch (it compacts over time, reducing its fall-attenuation properties), but it is the most popular residential choice. Rake monthly to prevent hard-packing and top up annually. Install landscape fabric below the sand to prevent weeds from rooting through.

Example 3 — Concrete Mix Sand (For a 20×20 ft Slab, 4 Inches Thick)

A 400 sq ft, 4-inch concrete slab requires coarse concrete sand as a mix ingredient. Standard concrete mix uses approximately 1,200 lbs of sand per cubic yard of concrete.

Real-world note: For a 400 sq ft slab, ordering ready-mix concrete by the truck is almost always faster, cheaper, and produces a stronger, more consistent result than site-mixing with bagged materials. A ready-mix truck delivers ~9 cubic yards per load at $150–$200/cu yd delivered — total ~$750–$1,000 for this slab vs $400–$800 in dry materials plus the labor of mixing. For any slab over 10 cu yd (roughly 300+ sq ft at 4 inches), use ready-mix. Use our Concrete Calculator to estimate ready-mix cubic yards.

Sand Types Guide

Using the wrong sand type for your application is one of the most common and costly mistakes in DIY projects. Sand types differ in particle size, angularity, cleanliness, and compaction behavior.

Recommended Sand Depth by Application

Sand Coverage Chart

Quick reference based on standard sand density of ~100 lbs/cu ft, including 10% waste factor.

Based on 100 lbs/cu ft density with 10% waste. Actual coverage varies by moisture content and sand type. Coarse concrete sand is slightly denser than play sand.

Sand Cost by Type (2026)

Prices vary by type, quality, and region. Bulk delivery is dramatically cheaper than bags for any project over ~50 sq ft at 1-inch depth.

Hidden Costs Most Estimates Miss

1. Gravel Base Under Pavers

Sand estimates for paver projects often omit the compacted gravel base — which is 4–8 inches deep and typically 4–6 times more material by volume than the 1-inch sand bedding layer. For a 300 sq ft patio, the 6-inch compacted gravel base requires 4–5 tons of ¾" crushed stone at $25–$55/ton plus delivery — easily the largest line item in the project. Always include the base in your total material budget.

2. Polymeric Joint Sand

After laying pavers, the joints must be filled with polymeric joint sand (not regular sand) — this is a separate product that hardens when wet to lock pavers together and prevent weed growth. A 50 lb bag covers approximately 30–50 sq ft of joints. For a 300 sq ft patio, expect 4–8 bags at $20–$40 each ($80–$320). This is almost never included in initial sand estimates.

3. Delivery Minimums and Surcharges

Most bulk sand suppliers have a 1–3 ton delivery minimum. If your calculation comes to 0.8 tons, you’ll pay for 2 tons minimum or pay a small-load surcharge ($30–$75). Fuel surcharges of $10–$30 per delivery are standard in 2026. Always ask: What is the minimum delivery? Is there a small-load fee? Factor all of this into your per-ton cost comparison before choosing a supplier.

4. Screeding Tools and Equipment

Screeding paver bedding sand to a perfectly flat 1-inch depth requires screed guides (pipes or boards) and a long screed board. Rental screed pipes and boards cost $10–$25/day. A plate compactor for the gravel base costs $60–$80/day to rent. A hand tamper works for small areas but is exhausting on anything over 100 sq ft. Never skimp on base compaction — an under-compacted base is the most common reason pavers settle unevenly.

5. Play Sand Annual Top-Up

Play sand compacts, displaces into footprint edges, and reduces in depth over time — especially in heavily used play areas. Budget for an annual top-up of 10–20% of the original volume. A 500 sq ft play area at 6 inches needs roughly 1.5–2.75 tons per year to maintain protective depth. This ongoing cost is rarely factored into the initial project budget.

Common Calculation Mistakes

Using the Wrong Sand Type for Paver Bedding

The most common paver installation error: using fine play sand or mason sand for bedding instead of coarse concrete sand (ASTM C33). Fine sand shifts under paver load, doesn’t compact properly, and allows pavers to rock and sink within one season. The ICPI specifically requires coarse washed concrete sand for all paver bedding. It costs the same as fine sand — there is no cost reason to use the wrong type.

Using Too Much Bedding Sand to Fix an Uneven Base

A bedding layer thicker than 1.5 inches acts like a sponge — it compresses unevenly under load, causing individual pavers to sink at different rates. If your gravel base is uneven, the fix is to compact and re-grade the base, not to add more sand. The ICPI maximum bedding sand depth is 1 inch after screeding and before compaction. Adding 2–3 inches of bedding sand to level an uneven base is one of the most common causes of long-term paver failure.

Not Adding Waste Factor

The calculator gives exact theoretical volume. Real projects always need 10–15% more — sand displaces at edges, settling occurs, and some is lost during screeding. Running short on bedding sand mid-project means halting work and waiting for another delivery (which may arrive days later). Always add at least 10%.

Ordering Bags Instead of Bulk for Medium+ Projects

A 300 sq ft patio at 1-inch bedding depth needs 1.38 tons. That’s 55 bags of 50 lb sand at $6 each = $330 vs $35–$62 in bulk. For anything over 25 bags (~0.6 tons), bulk delivery is cheaper even with the delivery fee. Always do the math before buying bags from a hardware store for projects over 100 sq ft.

Forgetting the Gravel Base in the Paver Budget

Many homeowners budget only for the 1-inch sand layer when planning a paver project, then get surprised by the gravel base cost. For a 300 sq ft patio: bedding sand ~$50, gravel base ~$200–$300. The gravel base typically costs 4–6× more than the bedding sand. Always budget the complete paver base system, not just the sand.

Buying & Ordering Tips

• Order early — call your supplier 1–2 days ahead for bulk delivery, especially in spring and summer when landscape material demand peaks.
• Get 3 local quotes — bulk sand pricing varies by region and supplier. Call local quarries, landscape supply yards, and ready-mix plants to compare.
• Add 10–15% waste factor — always order more than your calculated amount to account for settling, edge spillage, and uneven ground.
• Confirm delivery access — bulk delivery trucks need clear access. Confirm the truck can reach your pour/spread area before ordering.
• Specify the sand type — always say "coarse concrete sand ASTM C33" (for paver base) or "washed play sand" (for playgrounds) when ordering. "Sand" alone could mean anything.
• Ask for washed sand — unwashed sand contains silt and debris that affects compaction and drainage. Ask specifically for washed product for any structural application.

How We Calculate

Volume (cu ft) = Length × Width × (Depth ÷ 12) · Tons = Volume × 100 ÷ 2,000 · Cubic Yards = Volume ÷ 27

The density constant of 100 lbs per cubic foot represents a reasonable average for bulk sand used in landscaping and construction. Coarse concrete sand (ASTM C33) typically runs 95–110 lbs/cu ft depending on moisture content and gradation. Play sand is slightly lighter at 90–100 lbs/cu ft. The calculator uses 100 lbs/cu ft as a reliable midpoint consistent with ASTM C33 coarse aggregate specifications.

Note: the original formula used 0.056 tons/cu ft (= 112 lbs/cu ft), slightly above the standard density. This version uses 0.050 tons/cu ft (= 100 lbs/cu ft) for a more accurate and conservative estimate. The 10% waste factor should always be applied before ordering. Cost range reflects 2026 US national average pricing from HomeAdvisor and landscape supply industry data across all sand types.

Frequently Asked Questions