FormuSolve
Home & DIY · Free tool

How much gravel do I need?

Enter the area in square feet and how deep, and get the gravel you need in cubic yards, tons, and bags — for a path, bed, driveway, or pea gravel project.

How much gravel for your project

Gravel is a volume calculation: area in square feet times depth. Because gravel is heavy, it's sold three ways — by the cubic yard (bulk), by the ton (bulk by weight), and by the bag — so this calculator gives you all three. Depth depends on use: 2 inches for decorative ground cover, 3–4 inches for a driveway or high-traffic path. Switch to the pea gravel tab for smooth, rounded pea gravel, common for patios and pathways.

Cubic yards vs. tons

Suppliers often quote gravel by the ton, but you measure your project by volume, so you need both. Typical gravel weighs about 1.4 tons per cubic yard (pea gravel is similar), which is how this tool converts your volume to tons — enough to order confidently, though exact weight varies by stone type and moisture. When in doubt, order slightly over; a partial return beats a second delivery fee.

Bags or bulk for gravel

Gravel bags are small (commonly 0.5 cubic feet) and heavy, so bag counts climb fast — bulk by the cubic yard or ton is usually the better deal for anything beyond a small border. If the calculator shows dozens of bags, price bulk delivery first.

Driveways and depth

For driveways, gravel is typically installed in layers over a base, and total depth can reach several inches. If you're building a driveway rather than topping one up, calculate each layer separately, and consider landscape fabric underneath to keep the gravel from sinking into the soil.

Frequently asked questions

How many tons of gravel do I need?

Multiply your cubic yards by about 1.4 (typical gravel weighs ~1.4 tons per cubic yard). This calculator shows tons alongside cubic yards and bags once you enter your area in square feet and depth.

How much gravel do I need per square foot?

It depends on depth. At 2 inches deep, one cubic yard covers about 160 square feet; at 3 inches, about 108. Enter your area and depth above for an exact amount in yards, tons, and bags.

How deep should gravel be?

About 2 inches for decorative ground cover, 3–4 inches for paths and driveways (often layered). Pea gravel is usually 2–3 inches. Deeper is more stable but costs more material.