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 in diameter (about 12 to 25 mm). The name “#57” refers to the sieve size used to screen the gravel during processing. Because of its shape and size, this gravel allows water to drain easily while still providing a solid, stable surface.
#57 gravel is usually made from limestone, granite, or trap rock and is prized for its versatility. It’s strong enough to support heavy loads and loose enough to facilitate natural water movement. Whether you're installing a French drain or laying a driveway, it’s one of the most widely used stone types in residential and commercial projects.
How is #57 Gravel Different from Other Gravels?
#57 gravel differs from other gravel types in size, shape, compaction behavior, and purpose:
| 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 the density is essential for accurate volume-to-weight conversions in your project. Below is a verified density table for #57 gravel across various materials and conditions:
| 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 the commonly used #57 gravel, we have used 1,600 kg/m³ density. You can change that according to your needs.
What Are the Applications of #57 Gravel?
#57 gravel is used in a wide variety of construction and landscape projects due 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 where smooth finish is needed (use crusher run or stone dust instead)
- Children’s play areas or barefoot zones — its angular edges can be sharp and uncomfortable
- Steep slopes without reinforcement — may shift without geogrid or proper edging
- Tightly sealed patios or walkways — it won’t bind and will remain loose underfoot
- Small gaps or narrow crevices — the stone size is too large for tight fitting
Tips to Use #57 Gravel
- Use a landscape fabric underneath for drainage projects to prevent soil intrusion and clogging
- Edge your paths or driveways to keep gravel from spreading over time
- Compact in layers (especially in driveways or concrete prep) to get a stable surface
- Mix with fines or sand if a smoother surface is needed
- Use proper slope to allow water runoff if you're using it on open surfaces
FAQs
How much does a cubic meter of #57 gravel weigh?
On average, about 1,600 kilograms (1.6 metric tons). This is based on standard limestone or granite material in moderately compacted condition, which is typical for driveways and drainage layers.
Can I use #57 gravel for a French drain?
Yes, it’s one of the most commonly used materials for French drains. The angular shape of #57 gravel creates air gaps that let water flow freely, which is exactly what you want for drainage. Just make sure to wrap the gravel with 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. If you drive over it or layer it under concrete, it will form a solid base over time. For firmer surfaces, some people mix it with smaller aggregate or fines on top.
Is #57 gravel comfortable to walk on?
Not really. Since the stones are angular and up to 1 inch in size, they can feel sharp underfoot. It’s not ideal for barefoot areas, play zones, or walking paths without shoes. For that, consider pea gravel or finer stone.
How deep should I install #57 gravel for a driveway or pad?
A layer of 4 to 6 inches (10 to 15 cm) is usually enough for cars and light trucks. For heavier loads like RVs or trailers, you may want 6 to 8 inches, compacted in two layers.
Can I mix #57 gravel with other stone types?
You can, especially if you want different surface behavior. For example, topping #57 gravel with crusher run or stone dust creates a firmer, smoother finish. Just avoid mixing with very different-sized stone unless there’s a clear use case (like decorative top layers).
Does #57 gravel retain water or cause flooding?
No, it’s one of the best choices for avoiding puddles and improving drainage. As long as the area is graded properly, water will pass through quickly. If you’re using it in a drainage trench, it’s actually designed to help water escape.