Gravel & rock
Estimate crushed stone volume for bases, drainage and landscaping. 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 crushed-stone volume for a defined layer while keeping the geometric result separate from grading, compaction and mass assumptions.
Use separate results for drainage stone, sub-base, bedding or surface layers. A project may specify more than one crushed-stone grading.
Measure the prepared formation for each layer, including changes in level or width. Enter the required layer thickness from the project specification and do not combine it with a separate bedding course.
Crushed stone is angular and may be supplied in different gradings. It is not automatically the same as crusher run, road base or decorative stone.
A patio base is 5.5 m by 4.2 m, but a 1.0 m by 0.8 m service chamber is excluded. Net area is 23.1 − 0.8 = 22.3 m². At 100 mm, or 0.10 m, base volume is 2.23 m³.
The example uses geometry only. It does not insert a density, package size, recommended depth or supplier tolerance.
State the grading, fines content and whether the supplier quantity is loose or compacted. If the quotation is by mass, use only its product-specific bulk density.
The tool does not determine structural capacity or convert compacted design volume into delivered loose volume without approved data.
No. Use a product-specific, approved conversion if the specification requires delivered loose quantity from compacted volume.
Not necessarily. Confirm grading and fines content with the specification or supplier.
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.