How to use this gravel calculator
- Measure the length and width of the area.
- Choose the depth: 2–3 inches for paths, 4–6 inches for driveways (often in two layers).
- Pick the material type to estimate the weight.
- Add 5–10% extra for compaction.
Example
A 50 ft long, 10 ft wide gravel driveway with a 4 inch layer needs 6.17 cu yd of gravel. With crushed stone weighing about 1.4 tons per cubic yard, that is roughly 8.74 tons. Because gravel compacts, order 5–10% more than the result.
What to know before you buy
Common gravel types
Crushed stone (#57, about 3/4 inch) is the go-to for driveways and drainage because its angular pieces lock together. Crusher run or road base mixes stone with stone dust and compacts into a firm base. Pea gravel is smooth and comfortable underfoot for paths and play areas but shifts easily. River rock is mostly decorative.
Buying by the ton or the yard
Quarries usually sell by the ton, landscape yards often by the cubic yard. This calculator shows both using typical densities, but moisture and stone type change the weight, so confirm the conversion with your supplier for large orders.
Gravel for common projects (crushed stone)
| Project | Gravel needed | Weight (US tons) |
|---|---|---|
| Path 3 × 30 ft, 3 in | 0.83 cu yd | 1.18 tons |
| Patio base 12 × 12 ft, 4 in | 1.78 cu yd | 2.52 tons |
| Shed base 10 × 12 ft, 6 in | 2.22 cu yd | 3.15 tons |
| Driveway 10 × 50 ft, 4 in | 6.17 cu yd | 8.74 tons |
| Driveway 12 × 60 ft, 6 in | 13.33 cu yd | 18.88 tons |
Formula
Volume = length × width × depth. Weight = volume × density. Crushed stone weighs roughly 2,800 lb per cubic yard (≈ 1,680 kg/m³); actual density varies by supplier and moisture.
Tips from the pros
- Build driveways in layers: a base of larger crushed stone (#3 or #57) topped with 2–3 inches of finer gravel.
- Use landscape fabric under paths to stop gravel from sinking into the soil.
- Ask the quarry for the density of the exact product; wet or large stone weighs more.
Common mistakes to avoid
- Ordering by cubic yards when the supplier sells by the ton (or vice versa); check both numbers above.
- Using round pea gravel on slopes or driveways: it rolls and does not lock together like crushed stone.
Frequently asked questions
How much does a cubic yard of gravel weigh?
Typically 1.3 to 1.5 US tons (2,600–3,000 lb), depending on the stone and moisture.
How deep should driveway gravel be?
Around 4–6 inches of compacted base, often with a 2–3 inch top layer of finer gravel.
How much area does a ton of gravel cover?
At 2 inches deep, one ton of crushed stone covers roughly 100–120 sq ft; at 4 inches, about half that.
What size gravel is best for a driveway?
A base of larger crushed stone (#3 or #57) topped with a layer of smaller crushed stone or crusher run gives a firm, well-draining surface.