#4 Crushed Stone: Uses, Coverage & Calculator
Large, heavy-duty crushed stone for the bottom layer of driveways, construction entrances and serious drainage.
What is #4 Crushed Stone?
#4 is one of the largest common crushed stone sizes, with pieces roughly 1½″ to 2½″. Its size and weight make it hard to push around, so it holds up under heavy trucks and equipment.
Large voids between stones move water quickly, which suits soft or wet ground. It is usually covered with a smaller stone to create a smooth driving surface.
| Specification | Details |
|---|---|
| Size | About 1½″ to 2½″ |
| Shape | Angular, crushed |
| Fines | Low |
| Color | Varies by quarry |
| Approx. weight | 1.40 tons (~2,800 lbs) per cubic yard |
Best uses
- Bottom layer of new driveways and farm lanes
- Construction entrances
- Stabilizing soft or muddy ground
- Large drainage beds and culvert outlets
Not ideal for
- Walking surfaces (too large and uneven)
- Top layer of a driveway
- Bedding under pavers or pipes
How much #4 Crushed Stone do I need?
Enter your area and depth to get cubic yards and tons. Results update as you type.
You'll need about
Based on about 1.40 tons (~2,800 lbs) per cubic yard. Actual weight varies with moisture and source, so treat results as an estimate.
Recommended depth by project
Typical installed depths for #4 Crushed Stone. Check local codes or your contractor for structural work.
| Project | Depth | Notes |
|---|---|---|
| Driveway sub-base | 4″ | Cap with 2–3″ of smaller stone |
| Construction entrance | 6″ | Over geotextile fabric |
| Soft ground stabilization | 6″ | Add in lifts until firm |
How to install #4 Crushed Stone
A few steps make a big difference to how long it lasts.
- Lay fabricOn soft soil, lay geotextile fabric so the stone does not sink.
- Spread and compactSpread #4 in one lift and track it in with heavy equipment.
- Cap itFinish with crushed run, road base or #57 for a smooth surface.
#4 Crushed Stone questions
Quick answers to what customers ask most.
Can I drive directly on #4 stone?
You can, but the large stones make a rough ride. Most driveways cap #4 with a smaller stone.
How much area does a ton of #4 cover?
At 4″ deep, about 58 sq ft per ton.
What is #4 stone used for most?
Driveway and road sub-bases, construction entrances and drainage where large voids are useful.
Related materials
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Read guide & calculator →Ready to order #4 Crushed Stone?
Delivered by the ton or cubic yard to your driveway or job site.