Washed Sand Calculator: Volume & Cost Estimator

This calculator works out the volume of washed sand you need for a project, using the length, width, and depth of the area you plan to fill. Enter your measurements in feet (or meters) and inches, and it returns the volume in cubic yards and cubic feet, plus an estimated weight. You can also input a price per ton to get a rough cost for the sand.

Formula

The core formula converts your area and depth into a volume. For cubic feet: Volume (ft³) = Length (ft) × Width (ft) × Depth (in) / 12. To get cubic yards, divide the cubic feet by 27, or use the combined factor: Volume (yd³) = Length (ft) × Width (ft) × Depth (in) / 324 (since 12 × 27 = 324).

Variables:

• L – Length of the area in feet (ft).
• W – Width of the area in feet (ft).
• D – Depth of sand in inches (in).
• Volume – Result in cubic yards (yd³) or cubic feet (ft³).
• Weight – Approximate tons, using a density of about 2,700 lb per cubic yard (or 100 lb per ft³).

Worked Example

Using the default values: a 40 ft by 25 ft area, 3 inches deep.

1. Calculate area: 40 ft × 25 ft = 1,000 ft².
2. Convert depth to feet: 3 in ÷ 12 = 0.25 ft.
3. Volume in cubic feet: 1,000 ft² × 0.25 ft = 250 ft³.
4. Convert to cubic yards: 250 ft³ ÷ 27 = 9.26 yd³ (the calculator shows 9.26).
5. Estimated weight: 250 ft³ × 0.00135 tons/ft³ = 0.3375 tons (rounded to 0.34).

So the calculator returns 9.26 cubic yards, 250 cubic feet, and about 0.34 tons (or 675 lb). This matches the block’s outputs.

Why Use Washed Sand?

Washed sand is quarried or dredged, then run through water to remove silt, clay, and other fine particles. This leaves a clean, consistent product that drains well and compacts evenly. It’s used for:

• Under pavers and interlocking stones – provides a stable base.
• Playgrounds and beach volleyball courts – soft, clean surface.
• Masonry and concrete mixing – consistent aggregate.
• Golf course topdressing and lawn leveling.

Unlike fill sand (which may contain organic matter), washed sand is more predictable and less likely to shift or hold water.

How to Measure Your Project

Accurate measurements are key. Use these steps:

1. Measure length and width at the widest points, in feet. For irregular shapes, break the area into rectangles, calculate each, then add together.
2. Decide the depth. For paver base, 1–2 inches of sand is typical; for a playground, 6–12 inches is common. Check with your contractor or project guide.
3. Convert all measurements to the same unit. If you measured in meters, convert to feet (1 m ≈ 3.281 ft) or use the calculator with meters and adjust the depth accordingly.
4. Add a waste factor of 5–10% for compaction, spillage, or uneven ground. For example, if you need 10 yd³, order 10.5–11 yd³.

Common Mistakes and Misconceptions

Mixing units is the most frequent error. Depth is often given in inches, but length/width in feet. Always convert to one unit. The calculator handles this automatically, but if you do it manually, remember 1 ft = 12 in.

Overestimating depth – more sand isn’t always better. For paver bases, too much sand can cause shifting. Stick to the recommended depth for your project.

Ignoring compaction – washed sand compacts by about 10–15%. If you need a final depth of 3 inches, you’ll need to order slightly more to account for settling. This calculator gives the loose volume; add waste accordingly.

Weight vs. volume – suppliers sell by the cubic yard or ton. The weight of sand varies with moisture, but a common figure is 2,700 lb per cubic yard. The calculator uses this, but confirm with your supplier.

How to Choose the Right Sand

Not all sand is the same. Washed sand comes in different grades:

• Coarse washed sand – larger particles, good for drainage and concrete.
• Medium washed sand – all-purpose, for paver bases and play areas.
• Fine washed sand – smooth, for leveling and topdressing.

Ask your supplier for the sieve analysis (particle size distribution) if you need a specific grade. Also, check that it’s truly washed – some “washedâ€� sand still contains fines. A simple test: squeeze a handful; if it holds together when dry, it has clay.

Cost and Ordering Tips

Washed sand is typically sold by the cubic yard (loose) or by the ton. Prices vary by region and quantity. To estimate cost, multiply the volume in cubic yards by the price per yard, or use the weight in tons times the price per ton. Remember:

• Delivery fees are often separate.
• Minimum order quantities may apply.
• Bulk orders (more than 10 yd³) often get a discount.
• Ordering a bit extra (5–10%) is cheaper than running short and paying a second delivery.

For a 9.26 yd³ project, if the price is $30 per ton and the weight is about 12.5 tons (9.26 × 1.35), the sand cost would be roughly $375. Add delivery and waste.

Safety and Handling

Sand is heavy – a cubic yard can weigh over a ton. Use proper lifting techniques and equipment when moving bags or piles. Avoid inhaling fine dust; wear a dust mask if working in dry, windy conditions. Keep sand away from children’s play areas until it’s placed and settled. If you’re mixing concrete, follow standard safety gear (gloves, eye protection).

Frequently Asked Questions

How many cubic feet are in a ton of washed sand? A ton of dry washed sand is about 20 cubic feet (since 1 ton = 2,000 lb, and sand weighs ~100 lb/ft³). However, moisture increases weight, so it could be less. Use the calculator’s weight output to convert.

Can I use washed sand for a paver base? Yes, washed sand is a common base for pavers, typically 1–2 inches thick. It provides a level, stable surface, but it must be compacted and screeded properly. For heavy traffic, a crushed stone base underneath is recommended.

How deep should sand be for a playground? For playground safety, a depth of 6–12 inches of loose fill is typical, depending on the fall height. Check with safety guidelines (e.g., ASTM F1292) for specific equipment. The calculator can help you estimate volume for any depth.

What’s the difference between washed sand and regular sand? Washed sand is screened and rinsed to remove fines and organic material. Regular “fill sandâ€� may contain clay, silt, and debris, making it less stable and more prone to holding water. Washed sand is cleaner and more uniform.

Does the calculator account for compaction? No, it gives the loose volume. To account for compaction, add 10–15% to the volume. For example, if you need 10 yd³ of compacted sand, order 11–11.5 yd³.

Can I use this for other types of sand? Yes, the volume calculation works for any sand. The weight estimate assumes a density of 2,700 lb/yd³, which is typical for washed sand. For other types (e.g., silica sand), the density may differ, so adjust accordingly.

Related

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in l | Lawn length | ft | 40 | 0 | 100000
in w | Lawn width | ft | 25 | 0 | 100000
in d | Depth | in | 3 | 0 | 120
in p | Price per ton | $ | 30 | 0 | 1000
out yd | Volume | yd³ | l * w * d / 324 | 2
out ft3 | Volume | ft³ | l * w * d / 12 | 1
out tons | Estimated weight | tons | (l * w * d / 12) * 0.00135 | 2
out cost | Estimated cost | $ | ((l * w * d / 12) * 0.00135) * p | 0