Gravel for a 100×20 ft Driveway at 4 Inches Deep
A long 100×20 ft double-lane driveway at 4 inches of gravel depth requires approximately 24.7 cubic yards.
How to use this tool
- Enter the length and width of the area in feet.
- Enter the desired gravel depth in inches.
- The calculator returns cubic feet, cubic yards, and approximate tons.
A 100-foot two-lane driveway with 4 inches of gravel requires nearly 25 cubic yards — roughly 2–3 dump truck loads.
Frequently asked questions
- How much gravel do I need for a driveway?
- Driveways typically need 4–6 inches of gravel depth. Multiply length × width × depth (in feet) ÷ 27 for cubic yards. One cubic yard weighs about 1.4 tons.
- How many tons of gravel per cubic yard?
- Pea gravel and crushed stone weigh approximately 1.4 tons per cubic yard. Denser materials like limestone gravel can weigh up to 1.5 tons per cubic yard.