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How Much Stone Do I Need for a Driveway? Formulas & Examples

Understanding Driveway Stone Requirements

A long-lasting, sturdy driveway starts with the right stone. Installing a new layer or redoing an old one, the right material offers good drainage and strength to bear weight. A weak or shallow base will lead to settling, rutting, and erosion in the future. With good prep work and the right stone, you'll enjoy a driveway that lasts all year.

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Best types of stone for driveways

Landscape Barn recommends the following stones to use on driveways:

3/4" Crushed Stone

Excellent for driveway base layers due to its ability to compact while still allowing water to drain.

Recycled Concrete Aggregate (RCA)

A sustainable, cost-effective alternative that performs well as a base stone.

Item #4 or Road Base Mix

A blend of stone dust and crushed stone, ideal for creating a tight, durable sub-base.

3/8" or 1/4" Chips

Used as a top dressing for finished driveways, especially for aesthetic appeal or smoother traction.

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Crushed Stone

2-3" Crushed Stone

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Crushed Stone

#57 Crushed Limestone

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Crushed Stone

#67 Crushed Stone

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Crushed Stone

1-1/4" Crushed Stone

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Crushed Stone

3/8" Crushed Stone

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Crushed Stone

3/4" Crushed Stone

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Planning Your Driveway Area

Invest some time to plan the size, shape, and arrangement of your driveway prior to determining stone quantities or scheduling deliveries to help save you time and money.

How to measure driveway dimensions (length × width)

Measure your driveway's length and width using a measuring wheel or tape measure. If your design is not a perfect rectangle, take each in sections and apart from the others. Round up to the nearest foot to give you more than enough material.

Recommended base and top layer depth

Most driveways require:

  • 4" to 6" of compacted base stone for passenger vehicles.
  • 6" to 8" for trucks or high-traffic rural driveways.
  • 1" to 2" of top dressing stone for appearance and surface refinement.

Total depth will vary depending on your soil, usage, and budget — but underbuilding the base is a mistake you don’t want to make.

Calculating How Much Stone You Need

Once your dimensions and desired depth are locked in, it’s time to run the numbers. A bit of simple math will keep your project on track and prevent underordering.

Volume formula (Length × Width × Depth ÷ 27)

To get your stone volume in cubic yards, use this formula: Length (ft) × Width (ft) × Depth (in ÷ 12) = cubic feet, then ÷ 27 = cubic yards.

Converting volume to tons

Most driveway stone weighs around 1.4 to 1.5 tons per cubic yard. Multiply your cubic yards by 1.4 to estimate total tons needed. Your local supplier can help fine-tune this based on the material you choose.

Example estimates by common driveway sizes

Here are some rough estimates using a 6" base of 3/4" crushed stone:

Single-car driveway (10×20) with 4″ base

  • Volume: 10 × 20 × (4in ÷ 12) ÷ 27 = 2.47 cubic yards
  • Approx. 3.5 tons of stone

Double-car driveway (20×20) with 6″ base

  • Volume: 20 × 20 × (6in ÷ 12) ÷ 27 = 7.41 cubic yards
  • Approx. 10.4 tons

Long rural driveway (12×100) with 6″ base

  • Volume: 12 × 100 × (6in ÷ 12) ÷ 27 = 22.22 cubic yards
  • Approx. 31.1 tons

Circular driveway (20×40) with 8″ base

  • Volume: 20 × 40 × (8in ÷ 12) ÷ 27 = 19.75 cubic yards
  • Approx. 27.7 tons
Crushed Stone Driveway

Installation Tips

Installing a stone driveway is not just dumping rocks and raking them level. Your prep work and layering quality will dictate how well your driveway will endure.

Site prep, grading, and drainage basics

You will first want to take out grass, topsoil, and any leftover debris. Afterward, grade the area for water drainage and preventing pool areas. A slight crown in the middle or slight fall to the sides helps with water drainage. Compact the sub-base soil before placing stone.

Layering base stone and top dressing

Spread your base material in 3" layers and compact each thoroughly using a plate compactor or roller. If you’re using a top layer, add it after the base is fully compacted, and spread evenly to a depth of 1–2 inches. Compact again to lock everything in.

Accounting for Waste and Settling

Even with precise math, real-world conditions mean you’ll likely use more stone than the raw calculations suggest.

Why you should order extra material

Stone settles under traffic and compaction, and some material will get lost during spreading. We recommend ordering 10% extra to account for settling, irregular terrain, or touch-ups later.

Common Mistakes to Avoid

Driveway projects fail when people try to save money in the wrong places or skip key steps.

Using the wrong stone mix or skipping compaction

Avoid pea gravel or round stone—it doesn’t lock together and shifts easily. Skipping compaction leads to an uneven surface and early ruts. Always use angular crushed stone and compact in layers for a solid, stable base.

Final Thoughts and Next Steps

Your driveway is one of the hardest-working parts of your property. With proper planning, quality stone, and a bit of sweat, you can build a driveway that holds up for decades. If you're ready to start your project, contact Landscape Barn today — we’ll help you choose the right stone and get it delivered to your door, fast and hassle-free.

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