Pros & DIYers: Order Crushed Limestone Sizes Right, Check Gradation

For most driveway, drainage, and concrete uses, No. 57 crushed limestone with a nominal size near 3/4" is the default choice. No. 67 is often selected for cleaner drainage or tighter finish needs, and crusher run or #411 is used when a compactable base is required rather than open drainage stone. Grade numbers reference ASTM and AASHTO gradation standards, not one exact particle size, so the real verification tool is a gradation certificate, not a tape measure.

TL;DR:

• Most driveway projects should prioritize crushing or blending limestone with fines to ensure proper compaction and stability rather than relying solely on open-drainage grades.
• The size grades, like #57 and #67, are based on percentage passing sieve analysis, not exact particle dimensions, so a gradation certificate is essential for verification.
• #57 limestone roughly includes particles between 3/8 inch and 1.5 inches, while #67 compacts tighter, making it preferable for finish work needing smoother surfaces.
• Gravel driveway bases typically combine coarse #3 or #4 with intermediate #57 or #67, followed by a finer bedding layer, rather than using only one grade.
• Confirm the actual gradation table before ordering, as two loads with similar appearances can vary significantly in fines content and performance.

Table of Contents

• What Do Crushed Limestone Sizes Actually Mean?
• How Do You Read a Gradation Chart for Crushed Limestone?
• How Do You Choose the Right Grade for Your Project?
• How Much Crushed Limestone Do You Need, and What Does It Cost?
• What O’Leary Development Group Watches for on Delivery
• What Most Buyers Get Wrong About Crushed Limestone Sizes
• Order Crushed Limestone Sizes Delivered to Your Job Site
• Sources
• FAQ

What Do Crushed Limestone Sizes Actually Mean?

Here’s how the common grades break down, from coarse structural stone to fine screenings.

Single-digit grades (#1 through #5) run coarse to medium and typically show up in heavy civil and drainage work rather than residential finish layers. #1 stone (roughly 2 to 4 inches) handles erosion control and large void fill. #3 (about 1 to 2.5 inches) works well as a deep subbase layer under roads and heavy pads. #5 (around 1/2 to 1.5 inches) bridges the gap between structural base and the finer contractor grades most homeowners actually order.

Blended and contractor-favorite grades are where most driveway, patio, and drainage projects live. #57 (nominal 3/4 inch) is the industry-standard versatile aggregate, balancing permeability with enough interlock to stay stable underfoot and under tires. #67 runs slightly finer and compacts tighter, which is why finishers often prefer it for thin slabs. #8 (about 3/8 inch) and #9 are common for exposed aggregate finishes and pipe bedding. #10, also called stone dust or screenings, is essentially limestone fines, the material that fills voids between larger stones or serves as a leveling bed under pavers. Crusher run, sometimes labeled DGA or #411, blends stone with fines by design, producing a dense, compactable base rather than an open, draining one.

A few quick examples of how those grades pair with real jobs:

• A gravel driveway base usually starts with #3 or #4 for structure, not #57 alone.
• French drains almost always spec #57 stone because it drains fast without washing away.
• Paver patios need a compactable base layer plus a thin bedding layer of stone dust or manufactured sand to lock the pavers in place.

How Do You Read a Gradation Chart for Crushed Limestone?

Grade numbers like #57 or #67 are shorthand for a percentage-passing table, not a promise about one particle diameter. AASHTO M43 and ASTM D448 define, sieve by sieve, how much material must pass through each screen size for a batch to legally carry that grade number.

Take No. 57 as the working example. Its AASHTO M43 gradation table requires:

• 100% passing the 1.5" sieve
• 95 to 100% passing the 1" sieve
• 90 to 100% passing the 3/4" sieve
• 25 to 60% passing the 1/2" sieve
• 0 to 15% passing the 3/8" sieve
• 0 to 5% passing the No. 4 and No. 8 sieves

A batch that swings outside those ranges technically isn’t No. 57, no matter what the delivery ticket says.

That’s why a printed sieve analysis, sometimes called a gradation certificate, matters more than eyeballing a stockpile. Two loads that look nearly identical can behave very differently under a compactor if their fines content differs. If a quarry or hauler can’t produce that certificate on request, treat it as a red flag rather than a technicality. One more wrinkle worth knowing: naming conventions shift by region. What one supplier calls “3/4 minus” another might label #57 or crusher run, so confirm the actual gradation table behind the name before you order, not just the label.

How Do You Choose the Right Grade for Your Project?

Picking a grade comes down to two questions: does the layer need to drain, or does it need to compact into a solid, load-bearing surface? Open-graded aggregate keeps voids intact for drainage, while dense-graded material like crusher run mixes fines in deliberately, so it locks tight under a plate compactor. Using a clean, open-graded stone where you need a compactable base is one of the most common ordering mistakes, and it usually shows up months later as ruts and soft spots.

Layered projects work best with a structural approach, not a single grade dumped and graded flat:

1. Driveways: Start with 4 to 6 inches of coarse base stone (#3 or #4), compacted, then add 3 to 4 inches of #57 or #67 as an intermediate layer, and finish with 1 to 2 inches of #8 or #57 depending on the look you want.
2. Concrete slabs: A compacted crusher run or #411 base under the forms gives you a stable, non-shifting surface before the pour.
3. French drains and drainage trenches: Skip the fines entirely; #57 or #67 clean stone keeps water moving instead of clogging with silt.
4. Paver patios and walkways: Compactable base layer first, then a thin bedding course of stone dust for leveling before setting pavers.
5. Erosion control on slopes: Coarser single-digit grades (#1 or #3) resist washout better than fine screenings ever will.

Between #57 and #67 specifically, the choice is smaller than most buyers assume. #67’s tighter gradation spread means it compacts denser and trowels smoother, which is why finishers reach for it on thin slabs. #57 keeps a bit more open structure, which favors drainage-first applications like French drains and drain fields. If you’re not sure which priority wins on your job, drainage or finish, ask the question directly rather than guessing.

Pro Tip: Before the truck leaves your site, grab a handful of stone from the pile and check it against the size range on your invoice. A load that’s mostly dust and fines when you ordered clean #57 is worth flagging before you spread it, not after.

How Much Crushed Limestone Do You Need, and What Does It Cost?

Estimating limestone starts with a basic volume-to-weight conversion, since material is sold by the ton but measured for coverage in cubic yards. Because density varies by size, moisture, and rock type, always confirm the supplier’s bulk density figure rather than relying on a generic online calculator alone.

1. Calculate volume: length (ft) × width (ft) × depth (ft) ÷ 27 = cubic yards needed.
2. Convert to tons: most crushed limestone runs roughly 1.3 to 1.5 tons per cubic yard, but confirm with your supplier before ordering.
3. Worked example: a 20 ft by 10 ft driveway section at 6 inches (0.5 ft) deep needs about 3.7 cubic yards, or roughly 5 tons depending on density.
4. Check coverage: one ton of #57 typically covers about 80 to 100 square feet at a 2 inch depth, less at greater depths.

Pricing swings with grade, hauling distance, and order size, but expect crushed limestone prices to vary accordingly, with smaller specialty screenings often costing more per unit than bulk materials. Before you place the order, confirm: the grade number, whether you want clean stone or a “minus” blend, the nominal size in inches, a request for the gradation certificate, and clear delivery or dump-site instructions.

What O’Leary Development Group Watches for on Delivery

Receiving a load right matters as much as ordering the right grade. Ask for the weigh ticket and paperwork before the truck dumps, and do a quick visual spot check against the size range on your invoice. Stage the pile close to the work area but clear of drainage paths, and keep it accessible for equipment so you’re not double-handling material during compaction. O’Leary Development Group runs GPS-tracked deliveries across the San Antonio area, and that visibility is part of how contractors catch a size mismatch before it becomes a wasted trip.

What Most Buyers Get Wrong About Crushed Limestone Sizes

Most confusion around crushed limestone sizes comes from treating a grade number like a spec sheet you can eyeball. It isn’t. It’s a statistical range across multiple sieves, and two piles that look identical can compact completely differently depending on fines content. The gradation certificate is the actual product; the grade number is just shorthand for it.

The conventional advice, “just order #57 for anything,” gets contractors most of the way there, but it glosses over the drainage-versus-compaction question that actually determines project longevity. A driveway base built with clean, open-graded stone instead of crusher run will shift and rut within a season, no matter how good the surface layer looks on day one.

If there’s one priority worth fixing first, it’s asking for the sieve analysis before the truck shows up, not after the pile is already spread. That single habit prevents more callback jobs than any size chart ever will.

— BRIAN

Order Crushed Limestone Sizes Delivered to Your Job Site

Choosing the right grade only pays off if the material actually shows up correct, on time, and at a fair price. O’Leary Development Group is the direct alternative to sourcing from a stone yard and arranging your own hauling. We deliver #57 limestone, Grade 4 and Grade 5 chip stone, manufactured sand, and stone dust straight to your site with transparent per-load pricing and GPS-tracked trucks, so you know exactly what’s coming and when.

Contractor accounts get volume pricing, flexible scheduling, and net-30 invoicing, which cuts out the back-and-forth of one-off quote requests on every job. Homeowners and landscapers get the same straightforward booking process without needing an account at all. If you’re planning a driveway, drainage project, or paver base anywhere in Greater San Antonio, request a quote for dump truck hauling and material delivery and get a delivery scheduled before your crew runs out of stone.

Sources

Keep AASHTO M43 and ASTM D448 bookmarked. They’re the actual documents behind every grade number on this page. When you place an order, request the gradation table for your specific grade in writing so you have something to check the delivery against.

• Purdue Road School: Aggregate gradation and uses
• Understanding crushed stone grades: A complete guide (MachineryPartner)

FAQ

How Big Is #57 Crushed Stone?

No. 57 stone has a nominal size around 3/4 inch, but its actual AASHTO M43 gradation requires 90 to 100% passing a 3/4" sieve and 95 to 100% passing a 1" sieve, so particles range from roughly 3/8 inch up to just under 1.5 inches.

What Is the Difference Between #57 Crushed Stone and #4 Stone?

#4 stone runs noticeably coarser, typically used as a structural base layer, while #57 is finer and more versatile, working as both a drainage stone and a concrete aggregate.

How Much Does 1 Yard of Crushed Limestone Cost?

Pricing depends on grade, order size, and delivery distance, so it varies by supplier; request a per-load quote with your grade, quantity, and delivery address for an accurate number.

What Is the Main Difference Between #57 and #67 Limestone?

#67 has a tighter gradation spread than #57, which lets it compact denser for a smoother, more finish-ready surface, while #57 keeps a slightly more open structure that favors drainage.

Do I Need a Gradation Certificate for a Residential Project?

It’s not always required by code for small residential jobs, but requesting one protects you if the delivered material doesn’t match the grade you ordered.

Recommended

• Grade 5 Limestone Chip Stone
• Grade 4 Limestone Chip Stone