Stone Dust Calculator
Estimate how much stone dust you need for paver base layers and compaction, by cubic yards, tons, and bags.
Quick Answer
To calculate stone dust, multiply length × width × depth in feet, divide by 27 for cubic yards, then multiply by about 1.35–1.4 for tons. A 100 sq ft paver base at 1 inch of stone dust needs roughly 0.3 cubic yards — compact it in thin lifts.
Stone Dust Calculator Guide
The stone dust calculator (also called crusher dust or stone screenings calculator) helps you determine the precise amount of fine stone material needed for base layers, leveling, and compaction in landscaping and construction projects.
Stone dust is the byproduct of crushing larger stones and consists of particles smaller than 3/8 inch. It's essential for creating stable, compact bases for patios, driveways, and pathways. The material compacts exceptionally well, filling voids and creating a solid foundation. For complete patio planning, also consider our paver base material calculator and stone patio calculator.
Stone dust is typically applied in a 1-2 inch layer over a crushed stone base, then leveled to ensure pavers sit evenly. It also works well as a fill material in French drains, under walkways, and as bedding for hardscape projects. The calculator accounts for compaction factors to ensure you order enough material to achieve your desired finished thickness.
Screed Stone Dust Flat for a Level Paver Bed
Stone dust shines as a setting bed, but only if it goes down dead flat — any dip or hump telegraphs straight up through your pavers. The trick the pros use is screed rails: lay two pipes at your finished height, fill between them with stone dust, then drag a straight board across to strike it perfectly level. Just as important, compact the crushed-stone base beneath it first with a plate compactor, so the whole assembly doesn't settle unevenly once it's in use.
Paver Screed Rail Pipes
Set to your finished height, they let you strike stone dust perfectly level.
Check Price on AmazonPlate Compactor
Packs the base under the stone dust so the bed doesn't settle unevenly later.
Check Price on AmazonThe product links above are affiliate links — at no extra cost to you.
Frequently Asked Questions
How much stone dust do I need?
Measure your project area in feet and desired depth (typically 1-2 inches for leveling, 4-6 inches for base fills). Multiply length × width × depth ÷ 27 = cubic yards. For example, 100 sq ft at 1.5 inches needs 0.56 cubic yards. Our calculator automates this conversion.
What is the difference between stone dust and crushed stone?
Crushed stone is larger (3/4-1.5 inches) and used for base layers under driveways or patios. Stone dust is finer material (less than 3/8 inch) that compacts to nearly 100%, perfect for leveling or topping compacted crushed stone. Use both materials in layered projects for optimal compaction.
Does stone dust compact well?
Excellent. Stone dust compacts extremely well due to its fine particles that lock together. This makes it ideal for creating level surfaces. Unlike sand, which doesn't compact well for heavy loads, stone dust provides a stable, long-lasting base. Proper compaction is essential for longevity.
Can I use stone dust under pavers?
Yes, stone dust is commonly used as a 1-1.5 inch leveling layer over compacted crushed stone base. It allows minor adjustments to level pavers while providing good bearing support. Don't over-compact this layer—it should remain slightly loose for paver adjustments.
How much does stone dust cost?
Stone dust typically costs £15-25 per ton, making it one of the more affordable materials. The exact price depends on your location and supplier. Larger quantities usually receive volume discounts. Contact local suppliers for quotes on your calculated tonnage.