Gravel & rock
Estimate landscape rock volume for decorative beds and borders. See equivalent units and every active assumption.
Enter project dimensions.
Calculated quantities for your project.
Enter measurements and calculate to see the result.
Direct answer
Estimate the loose volume of landscape rock across a defined decorative area. Large particle sizes and irregular features make accurate boundary measurement especially important.
Use it for decorative beds, perimeter strips and landscape features. Keep different rock sizes, colours or zones separate when they will be purchased separately.
Measure the actual area inside the edging. Deduct large specimen rocks, planters or structures. If a bed narrows, split it at the change rather than using a maximum width.
Landscape rock is a visual-use category, not a defined engineering grading. Decorative names cannot supply density or coverage values.
A border is 12 m long with two widths: 7 m at 0.75 m and 5 m at 1.10 m. Area is 5.25 + 5.50 = 10.75 m². At an entered 65 mm depth, or 0.065 m, volume is 0.69875 m³.
The example uses geometry only. It does not insert a density, package size, recommended depth or supplier tolerance.
Use the supplier’s nominal size, colour and product code. Ask for the package or bulk-load unit and, for weight estimates, the relevant loose bulk density.
The calculator does not assess weed control, edging, slope stability or whether a chosen rock is safe for an application.
The geometric formula is unchanged, but voids, settlement and density may differ.
No. Use measured geometry and supplier information for the actual product.
Review BulkMeasure’s calculation methodology, learn how to measure an area, and read about volume, density and estimated weight. Browse the calculator directory when another material or project better matches the job.