Driveway Gravel Calculator — How Much Gravel For Your Driveway?
Calculate base, top course, tons, and delivered cost to your ZIP.
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Enter your dimensions on the left to see your recommended order quantity for the selected product.
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A gravel driveway done right uses two layers — a compacted base and a finer top course. Enter your driveway dimensions to find tons and cubic yards for both layers, with delivered pricing for Florida ZIPs.
How to use this driveway gravel calculator
- 1
Measure length and width
Most residential driveways are 10–12 ft wide. Measure the actual length you want to gravel, including any turnaround or parking apron.
- 2
Choose your layer system
Standard residential build: 4 inches of compacted lime rock base, then 4 inches of #57 stone top course. For heavy vehicles, 6 inches of base.
- 3
Run the calculator for each layer
Calculate the base material first (lime rock base or crushed concrete) at 4 inches. Then calculate the top course (#57 stone or millings) at 4 inches.
- 4
Get delivered pricing
Florida ZIPs return live delivered pricing. Most residential driveways take 2–4 truckloads total across both layers.
How the math works
Driveway gravel volume is Length × Width × Depth ÷ 27 (depth in inches divided by 12 to get feet). A 100 ft × 12 ft driveway at 4 inches is about 15 cubic yards.
For the full two-layer system, double the volume — 4 inches of base and 4 inches of top course. A 100 ft × 12 ft driveway needs roughly 30 cubic yards of gravel total.
We add compaction buffer (typically 15% for base material since it compacts hard, 10% for top course). The recommendation already includes the buffer.
How much does driveway gravel cover?
Quick reference for how much area one ton and one cubic yard cover at common depths.
| Depth | 1 ton covers | 1 cubic yard covers |
|---|---|---|
| 1" | 231 sq ft | 324 sq ft |
| 2" | 116 sq ft | 162 sq ft |
| 3" | 77 sq ft | 108 sq ft |
| 4" | 58 sq ft | 81 sq ft |
| 6" | 39 sq ft | 54 sq ft |
| 12" | 19 sq ft | 27 sq ft |
Assumes a density of about 1.4 tons per cubic yard, typical for #57 limerock and most washed gravels. Denser crushed stone covers slightly less per ton.
Typical quantities by project
| Project | Depth | Area | Estimate |
|---|---|---|---|
| 100 ft × 12 ft drive — base layer | 4" | 1,200 sq ft | ~15 cubic yards lime rock base |
| 100 ft × 12 ft drive — top course | 4" | 1,200 sq ft | ~15 cubic yards #57 stone |
| 50 ft × 10 ft short drive | 8" | 500 sq ft | ~12 cubic yards total |
| 200 ft rural drive | 8" | 2,400 sq ft | ~60 cubic yards total |
| Turnaround 30 ft × 30 ft | 8" | 900 sq ft | ~22 cubic yards total |
Which size should you use?
A gravel driveway uses different materials for base and top. Picking the right combination drives the cost and the lifespan.
Lime rock base (FDOT spec)
The compactable base course under any Florida residential driveway. Hardens like concrete under traffic.
Crushed concrete road base
Recycled, cheaper than virgin limerock, compacts almost as hard. Excellent budget base option.
#57 limerock stone
The standard residential driveway top course. Angular, interlocks, sheds water.
Recycled asphalt millings
Top course for long rural drives. Hardens like asphalt over months and resists washboarding.
Pea gravel / #89
Not for driveways. Looks great but ruts under any vehicle traffic.
Common ordering mistakes
From real deliveries — these are the mistakes we see most often. Avoiding any one of them saves a callback order.
Skipping the base layer
A single 4-inch layer of #57 on bare soil ruts within a season. The base layer is what carries the weight; the top course is just the finish. Always plan two layers.
Too thin overall
A 2-inch driveway looks like a driveway for 30 days. Florida sand and clay subgrade demands 8 inches total minimum — 4 inches of base + 4 inches of top course — to hold up.
Wrong top stone
Pea gravel and round river stone roll under tires. #57 angular limerock interlocks and stays put. For long rural drives, recycled asphalt millings harden over time and resist washboarding.
No crown or slope
A flat driveway holds water and washes out at the low end. Build a 2–3% crown from center to edges so water sheds off rather than channels through the gravel.
No edge containment
Without landscape timbers, pavers, or compacted shoulders, gravel migrates into the yard. Expect to lose 1–2 inches of depth per year to bleed-out without edges.
Skipping geotextile fabric
Fabric between the subgrade and the base layer keeps fines from pumping up into the gravel. A driveway without fabric loses base material to the soil and needs regrading much sooner.
Frequently asked questions
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