What is #57 Gravel?
#57 gravel is a crushed stone aggregate commonly used in construction, landscaping, and drainage systems. It consists of angular stones typically ranging from ½ inch to 1 inch (about 12–25 mm). The name “#57” refers to the sieve size used during processing. Its shape allows water to drain while providing a stable surface.
Made from limestone, granite, or trap rock, #57 gravel supports heavy loads yet remains loose enough for natural water movement. It’s ideal for French drains, driveways, patios, and more.
#57 Gravel Size and Gradation
The typical #57 gravel size ranges from ½ inch to 1 inch in diameter. This aggregate size is produced by screening crushed stone through standardized sieves. When people ask “what size is #57 stone” or “what size is 57 gravel,” they are usually referring to this ½″–1″ range.
Because of its uniform shape and lack of fine particles, #57 stone drains well while still locking together for structural support. It is commonly used as drainage rock, driveway gravel, and base material under slabs.
- Nominal size: ½″ to 1″
- Aggregate classification: No. 57 stone
- Common materials: Limestone, granite, trap rock
- Best for: Drainage, driveways, French drains, concrete base
How is #57 Gravel Different from Other Gravels?
#57 gravel differs in size, shape, compaction, and use:
| Gravel Type | Shape | Best Use |
|---|---|---|
| ½″ – 1″ | Angular | Drainage, driveways, concrete base |
| Pea Gravel | Rounded | Landscaping, playgrounds, decorative areas |
| Crusher Run | Angular + fines | Driveways, compacted base layers |
| #67 Gravel | Angular | Slabs, fine drainage |
| #3 Gravel | Angular | Base fill, erosion control |
| Recycled Gravel | Mixed | Budget fill, non-structural use |
Density of #57 Gravel
Knowing density ensures accurate volume‑to‑weight conversions. Below is a verified density table:
| Material Type | Density (kg/m³) | Notes |
|---|---|---|
| Limestone (common) | 1,520 – 1,560 | Most common #57 material |
| Limestone | 1,600 – 1,680 | Preferred for driveways or slabs |
| Granite | 1,600 – 1,650 | Heavier and stronger |
| Granite | 1,650 – 1,700 | Ideal for heavy-duty applications |
| Trap Rock (Basalt) | 1,680 – 1,720 | Highest density commonly used |
| Recycled Concrete | 1,400 – 1,500 | Lightweight but variable quality |
Based on common #57 gravel, we use 1,600 kg/m³. Adjust as needed.
What Are the Applications of #57 Gravel?
#57 gravel fits many projects thanks to its drainage and structural properties:
| Application | Why It’s Used | Typical Depth |
|---|---|---|
| Driveway Base | Interlocks for support, drains water | 4″–6″ (10–15 cm) |
| French Drain / Trench | Prevents water pooling, supports pipe systems | 6″–12″ (15–30 cm) |
| Concrete Slab Sub-base | Reduces cracking, provides stable foundation | 4″–8″ (10–20 cm) |
| Retaining Wall Backfill | Relieves hydrostatic pressure with drainage | Varies |
| Landscaping Beds | Aesthetic ground cover, inhibits weeds | 2″–3″ (5–7.5 cm) |
| RV or Trailer Pads | Withstands repeated tire loads | 4″–6″ (10–15 cm) |
| Under Decks & Sheds | Improves drainage, prevents mud | 3″–4″ (7.5–10 cm) |
| Erosion Control | Heavier rock resists movement on slopes | 6″ (15+ cm) |
Where #57 Gravel Should Not Be Used
- Highly compacted surfaces needing a smooth finish
- Children’s play areas or barefoot zones
- Steep slopes without proper edging
- Tightly sealed patios or walkways
- Small gaps or narrow crevices (use custom triangle calculator instead)
Tips to Use #57 Gravel
- Install landscape fabric underneath to prevent soil intrusion
- Edge paths or driveways to contain gravel
- Compact in layers for stability
- Mix with fines for a smoother surface
- Ensure proper slope for drainage
Weight of #57 Stone Per Cubic Yard and Ton
The weight of 57 stone depends on the material and moisture content, but on average:
- 1 cubic yard of #57 gravel weighs approximately 2,700–3,000 lbs
- 1 cubic yard equals about 1.3–1.5 tons
- 1 ton of 57 stone equals roughly 0.65–0.75 cubic yards
The average density of #57 stone is about 1,600 kg/m³, which helps convert between cubic yards, cubic feet, and tons. This is useful when estimating dump truck loads or determining how many tons you need for your project.
If you’re wondering “how much does a cubic yard of 57 stone weigh” or “what is the unit weight of 57 stone,” these estimates provide a reliable baseline for planning and ordering material.
How Much Does One Ton of #57 Gravel Cover?
Coverage depends on installation depth. Below is an approximate guide for how much area one ton of #57 gravel will cover:
| Depth | Coverage Per Ton |
|---|---|
| 2 inches | ~100 sq ft |
| 4 inches | ~50 sq ft |
| 6 inches | ~33 sq ft |
If you're asking “how much 57 stone do I need” or “how much does a ton of 57 gravel cover,” use this table as a quick reference. For more precise estimates, enter your dimensions into the calculator above.
FAQs
How much does a cubic meter of #57 gravel weigh?
On average, about 1,600 kg (1.6 metric tons) in moderately compacted condition.
Can I use #57 gravel for a French drain?
Yes. The angular shape lets water flow freely—ideal for French drains. Wrap in landscape fabric to keep out soil.
Will #57 gravel compact over time?
It doesn’t compact like sand or crusher dust, but it does settle and interlock. Mix with fines for firmer surfaces.
Is #57 gravel comfortable to walk on?
Its angular stones can feel sharp underfoot. Not ideal for barefoot areas—consider pea gravel instead.
How deep should I install #57 gravel for a driveway or pad?
4–6 inches (10–15 cm) for cars and light trucks; 6–8 inches for heavier loads.
Can I mix #57 gravel with other stone types?
Yes. Topping with crusher run or stone dust creates a firmer finish. Avoid mixing vastly different sizes.
Does #57 gravel retain water or cause flooding?
No. If properly graded, water passes through quickly—perfect for drainage trenches.