In short
- A gravel driveway calculator turns length, width and layer depth into cubic yards, tons and truckloads of rock.
- A common build is a 4 to 6 inch base of larger crushed rock with 2 to 4 inches of smaller gravel on top. The right depths depend on your soil and the trucks that will use it.
- Crushed rock commonly weighs about 1.3 to 1.5 tons per cubic yard. Order roughly 10 to 20% over because it packs down.
- A 300 x 12 ft driveway with a 40 x 30 ft pad is about 11 truckloads at 16 tons a load. All figures are typical planning numbers.
On this page
This gravel driveway calculator is for Tyler and Smith County landowners planning a barndominium on rural land who want to know how much rock the driveway and building pad take before they talk to a contractor. It gives area, cubic yards, tons and truckloads, with no prices. It supports our driveway, culvert and 911 address guide.
En español: calculadora de grava para la entrada del barndominium
| Your numbers | Result |
|---|
Material by layer (to order)
| Layer | Cu yd | Tons |
|---|
Example: 300 x 12 ft driveway, 40 x 30 ft pad, 4 in base and 3 in top, 1.4 tons per cubic yard, 15% extra, 16-ton loads.
How the tons and truckloads are worked out
- Area.
Length times width, plus the pad. 300 x 12 is 3,600 sq ft; 40 x 30 is 1,200; together 4,800 sq ft.
- Cubic yards of each layer.
Area times depth in feet, divided by 27. Base at 4 in: 4,800 x 0.333 / 27 = 59.3 cubic yards in place. Top at 3 in: 4,800 x 0.25 / 27 = 44.4.
- Add compaction.
Multiply each layer by 1.15 at 15% extra: 68.1 cubic yards of base and 51.1 of top to order.
- Convert to tons.
Base 68.1 x 1.4 = 95.4 tons. Top 51.1 x 1.4 = 71.6 tons. Total 167 tons.
- Divide by the load size.
167 / 16 is 10.4, so plan on 11 loads. The range shown above flexes the weight by 0.05 tons per cubic yard.
Typical driveway lengths, 12 ft wide
| Length | Area | Tons | Loads |
|---|---|---|---|
| 100 ft | 1,200 sq ft | 42 tons | 3 |
| 200 ft | 2,400 sq ft | 83 tons | 6 |
| 300 ft | 3,600 sq ft | 125 tons | 8 |
| 500 ft | 6,000 sq ft | 209 tons | 14 |
These use 4 in of base and 3 in of top gravel, 1.4 tons per cubic yard, 15% extra and 16-ton loads. No pad is included. A longer or wider driveway scales the tons in proportion; a thicker build scales them with depth.
What goes in each layer
| Layer | Typical depth | What to know |
|---|---|---|
| Base | 4 to 6 in | Larger crushed rock, often limestone flex base. It carries the weight and is compacted. |
| Top | 2 to 4 in | Smaller gravel for the driving surface. It needs topping up over time. |
| Fabric | Optional | Ask whether a geotextile under the base suits your soil. |
Depth is not one number. The right build depends on your soil, the trucks and how wet the ground gets. Concrete mixers and steel trucks are heavy. Use your contractor's design and use this tool only to check the tonnage.
Drainage, culverts and soft clay
- Crown and drainage. A driveway that holds water ruts quickly. Ask for a slight crown or one-way slope, and where the runoff goes. See our guide to drainage and grading on an East Texas lot.
- Culvert at the road. The entrance and culvert are approved by the road's owner before the work. The driveway, culvert and 911 address guide says which office to ask and what the county policy says.
- Soft clay. Much East Texas ground is clay that softens when wet. Read about it in the clay soil foundation guide, and ask your contractor whether geotextile fabric makes sense for the driveway.
Questions to ask about quantities
- Is the quote in tons or cubic yards? Ask which, and what weight per cubic yard it assumes.
- What material and what depth for each layer? Ask for the rock type and inches, in writing.
- Is the driveway and pad in the builder's price? Ask whether it is included, an allowance, or excluded. See the cost guide.
- Can trucks reach the pad in wet weather? The build timeline shows where site work fits.
- Will you give me weigh tickets? Tickets show the tons actually delivered.
Next step: get a written quote
This tool estimates material, not the price or the job. We are a referral service, not a contractor; we connect visitors with independent local providers. Use the form below to ask independent barndominium builders near Tyler for a written quote, and read how to choose a barndominium builder first. To compare quotes side by side, use the bid comparison calculator.
Sources
- Flex base guidelines, TxDOT: flexible base is the foundation course under pavement, and crushed limestone is the most common rock in Texas.
- How much does a yard of gravel weigh, HelloGravel (a supplier): typical gravel runs about 1.2 to 1.5 tons per cubic yard. Weights vary, so ask your supplier.
- Tri-axle dump truck weight guide, HelloGravel: typical payloads vary by truck and local limits.
- Aggregate compaction and ordering, ToolGrit: loose crushed stone shrinks when compacted, so orders are padded.
Frequently asked questions
How much gravel do I need for a driveway?
Multiply length by width for the area, then by the layer depth in feet, and divide by 27 for cubic yards. A 300 x 12 ft driveway at 4 inches of base is about 44 cubic yards in place. Crushed rock commonly weighs about 1.3 to 1.5 tons per cubic yard, so ask your supplier for the weight of the material you will get.
How deep should a gravel driveway be?
It depends on the soil and the traffic. Many rural driveways use a base layer of larger crushed rock, typically 4 to 6 inches, topped with 2 to 4 inches of smaller gravel. Delivery trucks and concrete mixers are heavy, and clay soil can turn soft, so ask your contractor what depth they plan and why.
Why order more than the finished depth?
Loose crushed rock packs down when it is compacted, so the volume delivered is larger than the layer left in place. Suppliers and calculators commonly add about 10 to 20 percent. Your supplier or contractor can tell you the factor for your material.
Do I need fabric under a gravel driveway?
Not always. A geotextile fabric between soft clay and the base is sometimes used to keep rock from sinking into the soil. It does not replace enough gravel for the loads. Ask your contractor whether it makes sense for your soil and how it would be priced.