Stone Dust Calculator: Estimate Coverage & Cost

This stone dust calculator works out how much stone dust you need for a given area, based on the length, width, and depth you plan to fill. Enter your project dimensions in feet or meters, and it returns the volume in cubic feet, cubic yards, and cubic meters, plus an estimated weight in tons and pounds. Use the result to order the right amount of material for a paver base, walkway, or shed pad.

Formula

The calculator uses the basic volume formula for a rectangular prism:

Volume (cu ft) = Length (ft) × Width (ft) × Depth (ft)

Since depth is usually given in inches, it is first converted to feet by dividing by 12. The weight estimate uses a typical density for loose stone dust of about 110 pounds per cubic foot, which equals roughly 1.4 tons per cubic yard. The exact density varies with moisture and stone type, so the weight is an approximation, not a precise measurement.

Worked Example

Using the default values from the calculator:

• Length = 10 ft
• Width = 8 ft
• Depth = 2 in = 2 / 12 = 0.1667 ft

Volume = 10 × 8 × 0.1667 = 13.33 cubic feet

Convert to cubic yards: 13.33 / 27 = 0.49 cubic yards

Convert to cubic meters: 13.33 × 0.0283168 = 0.38 cubic meters

Weight in tons: 13.33 × 0.055 = 0.73 tons (since 110 lb/ft³ ÷ 2000 lb/ton = 0.055 tons per cubic foot)

Weight in pounds: 13.33 × 110 = 1466 lb

So for a 10×8 foot area at 2 inches deep, you need about 0.49 cubic yards, which weighs roughly 0.73 tons or 1466 pounds. This matches the calculator output.

What Is Stone Dust and Why Use It?

Stone dust, also called quarry dust or crusher run fines, is the fine byproduct of crushing stone. It consists of angular particles from 3/8 inch down to dust, which compact tightly when tamped. It is commonly used as a base layer under pavers, flagstone, or concrete slabs because it provides a stable, level surface that resists shifting.

Compared to sand, stone dust locks together better due to its irregular shapes, making it less likely to wash out or erode. However, it can hold moisture and may retain water if not properly drained, which is a consideration for some projects. Many contractors prefer it for paver bases, while others choose coarse sand for easier leveling.

How to Measure Your Project Area

Accurate measurements are the key to a correct estimate. Follow these steps:

1. Measure the length and width of the area in feet. For irregular shapes, divide into rectangles and calculate each separately, then add them together.
2. Decide on the depth of stone dust. For a paver base, 1–2 inches is typical; for a driveway or heavy-use area, 4–6 inches may be needed. Check local building guidelines for specific requirements.
3. Add 10–15% extra to account for compaction, spillage, and uneven ground. Stone dust compacts by about 10% when tamped, so the loose volume you order should be slightly more than the final volume.
4. Convert all measurements to the same unit (feet or meters) before calculating.

Common Mistakes and How to Avoid Them

• Mixing units: If you measure length in feet but depth in inches, you must convert depth to feet first. Forgetting this leads to a volume 12 times too large.
• Ignoring compaction: Stone dust settles when tamped. If you order exactly the calculated volume, you may come up short. Always add a buffer.
• Overestimating density: The weight of stone dust varies from about 100 to 130 lb/ft³ depending on moisture and stone type. The calculator uses 110 lb/ft³, but if your supplier gives a different density, adjust the weight accordingly.
• Rounding too early: Round only the final result, not intermediate steps. Rounding the depth to 0.2 ft instead of 0.1667 ft changes the volume by 20%.

How to Read the Results and Order Material

Stone dust is sold by the cubic yard (or cubic meter) and by weight in tons. The volume tells you how much space the material will fill, while the weight helps with delivery and handling. For example, a small paver project of 50 square feet at 2 inches deep needs about 0.31 cubic yards, which is roughly 0.46 tons. Most suppliers deliver in whole or half-yard increments, so you might need to round up to 0.5 yards.

When ordering, tell the supplier the volume in cubic yards and the approximate weight. They can confirm the exact density of their product and adjust the tonnage. If you plan to haul it yourself, check your vehicle’s load capacity—one cubic yard of stone dust weighs about 1.4 tons, which exceeds the payload of many pickup trucks.

Cost Considerations

The price of stone dust varies by region and supplier, but it is generally one of the least expensive crushed stone products. Costs depend on the local quarry, delivery fees, and the quantity ordered. Bulk orders (more than a few cubic yards) usually have a lower per-yard price. To get an accurate cost, contact local suppliers and ask for a quote based on your calculated volume. Remember to include delivery charges and any taxes in your budget.

Safety and Handling Tips

Stone dust is heavy and can be hazardous if not handled properly. Wear gloves and safety glasses when shoveling or spreading it, as the fine particles can irritate skin and eyes. Avoid breathing in the dust by wearing a dust mask, especially in dry, windy conditions. When spreading, use a rake to level and a plate compactor to tamp. Make sure the area is well-drained to prevent water from pooling, which can weaken the base. If you have respiratory conditions, consider using a different base material or take extra precautions.

Alternatives to Stone Dust

Depending on your project, you might consider these alternatives:

• Coarse sand: Easier to level and drains well, but does not lock together as firmly as stone dust.
• Crushed stone (3/4 inch): Provides a strong base for larger projects like driveways, but is not suitable for fine leveling.
• Paver base panels: Plastic or foam panels that replace a layer of stone dust, reducing the amount of material needed.
• Gravel: For pathways, a 3/8-inch pea gravel may be used, but it shifts more underfoot.

Frequently Asked Questions

How much stone dust do I need for a 10×10 patio?

For a 10×10 foot area (100 sq ft) at 2 inches deep, you need 100 × (2/12) = 16.67 cubic feet, which is about 0.62 cubic yards. Add 10% for compaction, so order about 0.68 cubic yards, roughly 0.95 tons.

Can I use stone dust under pavers?

Yes, stone dust is a common base for pavers. It compacts well and provides a smooth, stable surface. However, ensure proper drainage and consider using a weed barrier to prevent weed growth.

How deep should stone dust be for a walkway?

For light foot traffic, 1–2 inches is sufficient. For heavier use, such as a wheelbarrow or frequent foot traffic, use 2–3 inches. Always compact the layer before laying pavers.

Does stone dust compact?

Yes, stone dust compacts significantly, typically by 10–15% of its loose volume. This is why you should order extra material to account for settling.

How many square feet does a ton of stone dust cover?

At 2 inches deep, one ton (2000 lb) covers about 2000 / (110 × (2/12)) = 109 square feet. At 1 inch deep, it covers about 218 square feet. The exact coverage depends on the density of the material.

Can I mix stone dust with cement?

Yes, stone dust can be mixed with cement to create a concrete-like material, often used for paths or bases. The typical mix is 1 part cement to 4–5 parts stone dust by volume, but follow manufacturer guidelines for specific applications.

Related

• Daily Percentage Increase Calculator
• Inflation Increase Calculator: How to Use
• Increase in Value Calculator: How to Use It

in length | Length | ft | 10 | 0
in width | Width | ft | 8 | 0
in depth | Depth | in | 2 | 0
out volume_cf | Volume | cu ft | length * width * (depth / 12) | 2
out volume_cy | Volume | cu yd | volume_cf / 27 | 2
out volume_cm | Volume | cu m | volume_cf * 0.0283168 | 2
out weight_tons | Weight | tons | volume_cf * 0.055 | 2
out weight_lbs | Weight | lb | volume_cf * 110 | 0