Planning a gravel driveway, path, or drainage bed? This calculator converts your area and desired depth into cubic yards and an approximate tonnage to order.
How to Use This Calculator
Enter the length and width of the area in feet and the desired gravel depth in inches, then click Calculate.
Formula
Cubic yards = (Length × Width × (Depth ÷ 12)) ÷ 27. Tons ≈ Cubic yards × 1.4, using a typical gravel density of about 1.4 tons per cubic yard (this varies by material — confirm with your supplier).
Gravel density varies by type (crushed stone, pea gravel, river rock) — check with your supplier for their exact density if you need a precise order.
Frequently Asked Questions
How deep should a gravel driveway be?
Most residential gravel driveways use 4-6 inches of base material, sometimes with an additional top layer.
How much does a cubic yard of gravel weigh?
Roughly 2,800 lbs (about 1.4 tons), though this varies by stone type and moisture content.
Should I order extra gravel?
Yes, adding about 10% extra is common to account for settling and uneven ground.