Gravel Calculator
Calculate gravel volume and weight needed for driveways, paths, and landscaping.
Whether you are laying a gravel driveway, filling a garden path, or preparing a sub-base for paving, knowing exactly how much gravel to order saves money and avoids delivery hassles.
The calculation multiplies length by width by depth to get volume in cubic meters, then multiplies by the material density to get weight. Gravel typically has a density of about 1.5 tonnes per cubic meter, though this varies — crusite stone runs about 1.6 t/m³ while pea gravel is closer to 1.4 t/m³.
For driveways, a depth of 100–150 mm is standard. Garden paths can use 50–75 mm. Always order 10% extra to account for compaction and spreading losses. Compacted gravel loses about 30% of its loose depth, so plan accordingly.