Planning a driveway, installing a patio base, creating a drainage bed, or surfacing a walkway requires gravel or crushed stone. Unlike wood mulch, gravel is highly dense and heavy, meaning understanding weight is just as important as volume. Ordering too little can leave you with an unstable base, while ordering too much leads to high delivery surcharges.
The recommended depth of your gravel layer depends on the application: - Walkways and Footpaths: A depth of 2 to 3 inches is typical for decorative pea gravel or crushed stone. - Patio and Shed Bases: 4 inches of sub-base gravel (like crusher run) provides solid compaction. For building with poured cement instead, try our building cement estimator. - Gravel Driveways: A depth of 6 inches is recommended, split into layers of different particle sizes.
To measure the flat area footprint of your project, you can use our floor space calculation tool. For checking general arithmetic, try our everyday daily math helper.
In bulk construction trade, aggregate is often sold by the ton rather than by cubic yard. Converting between them requires knowing the material's bulk density.
A standard cubic yard of dry gravel weighs approximately 1.4 tons (or 2,800 pounds). This density varies slightly by rock type and moisture content. For comparing aggregate volumes to organic ground covers, check out our garden bed mulch calculator. To round final weight demands to tidy figures, try our decimal rounding utility.
When gravel is spread and compacted (either by driving over it or using a mechanical plate compactor), the rocks slide together, reducing the total volume by 10% to 15%.
It is also important to install a high-quality landscape fabric base underneath the gravel layer. This fabric barrier prevents the stone from sinking into the subsoil over time while suppressing weed growth, keeping your gravel path clean and stable.
Therefore, you should add a 10% to 15% safety margin to your final volume order to ensure your finished depth meets structural requirements. To examine cost ratios across different aggregate suppliers, use our relative ratio solver. To find average material prices in your local area, use our group average finder.
Suppose you want to cover a driveway that is 30 feet long and 12 feet wide with a 4-inch layer of gravel.
First, calculate the surface area: 30 ft × 12 ft = 360 square feet.
Next, convert depth to feet: 4 inches / 12 = 0.333 feet.
Calculate volume in cubic feet: 360 sq ft × 0.333 ft = 120 cubic feet. Convert to cubic yards: 120 / 27 = 4.44 cubic yards.
Finally, calculate approximate weight in tons: 4.44 cubic yards × 1.4 tons/yard = 6.22 tons. You will need to order approximately 6.3 tons of gravel, showing how dimension data converts to aggregate weight.