Base materials
Estimate road-base volume for drives, paths and hardstanding. 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
Calculate the design volume of a road-base layer from its footprint and specified thickness. “Road base” refers to a project specification, not one universal blend.
Use it for access routes, driveways and hardstanding only after the responsible design identifies the course geometry and material.
Measure lane reaches separately where width or thickness changes. Include designed shoulders only when they use the same material and depth. Treat junction flares as triangles or separate polygons.
Road base can differ from crusher run or generic aggregate according to local specifications. Similar names should not override project documents.
An access route has a 22 m × 3.0 m main rectangle plus two triangular flares, each with 3 m base and 2 m perpendicular height. Area is 66 + 2 × (3 × 2 ÷ 2) = 72 m². At 150 mm, volume is 10.8 m³.
The example uses geometry only. It does not insert a density, package size, recommended depth or supplier tolerance.
Use the full specification designation and confirm the supplied grading, source and sale unit. Clarify how the supplier treats loose delivery versus compacted layer volume.
The calculator does not establish structural adequacy, layer design, compaction plant or quality acceptance.
No. The project designer or applicable specification must do that.
It describes the entered geometry. Delivered loose conversion requires approved product-specific information.
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.