Gravel Calculator
Enter the size of your driveway, path or bed to get cubic yards and tons of gravel to order.
These are estimates. Real jobs vary with surface, product and waste, so round up and check your product's label before you buy.
How much gravel do I need for a driveway?
Volume is length × width × depth, divided by 27 to get cubic yards. Gravel is usually sold by the ton, so we multiply by its weight per cubic yard. This table assumes a 4-inch layer, 10% extra for settling and 1.4 tons per cubic yard.
| Area (4 in deep) | Cubic yards | Tons |
|---|---|---|
| 10×10 ft | 1.36 | 1.9 |
| 10×20 ft | 2.72 | 3.8 |
| 20×20 ft | 5.43 | 7.6 |
| 12×50 ft | 8.15 | 11.4 |
How the gravel calculator works
A cubic yard of crushed stone commonly weighs between about 1.2 and 1.5 tons depending on the stone size and moisture, so ask your supplier for their figure and change the density above. The settling allowance covers compaction into the ground.
Depth and base tips
Paths and decorative areas often use 2 to 3 inches of gravel. Driveways commonly use 4 to 6 inches over a compacted base. Landscape fabric under the gravel helps keep it from mixing into the soil. Many suppliers also sell by the cubic yard, so confirm the unit before you order.
Frequently asked questions
How many tons of gravel are in a cubic yard?
Often about 1.4 tons, though it ranges from roughly 1.2 to 1.5 for common crushed stone.
How deep should a gravel driveway be?
Four to six inches over a compacted base is common. Soft soil or heavy vehicles may need more.
Should I order extra gravel?
Yes. Ten percent extra covers settling and uneven ground.