Project Volume Calculator
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Geometric volume plus any chosen allowance
Illustrative bulk topsoil density; moisture and composition affect weight. Allowances and costs are estimates; verify supplier units and field conditions.
Topsoil volume formula
Multiply length in feet by width in feet by depth in inches and divide by 324. If you measure several areas or variable depths, calculate separate sections and combine the resulting volumes.
Lawn topdressing and garden beds
A shallow lawn topdressing layer requires less soil than building up a deep planting bed. Use a realistic finished depth for the specific job. Avoid covering established turf too deeply without horticultural guidance.
Settling and soil properties
Topsoil is not a uniform material. Organic content, screening, moisture and compaction influence loose delivery volume and final grade. Supplier-specific recommendations are more reliable than a universal percentage.
Choosing the right soil
Topsoil, planting mix and compost serve different functions. Ask about texture, screening, contaminants and suitability for the desired plants or landscaping application.
Frequently Asked Questions
How much topsoil for 100 square feet at 6 inches?
Approximately 1.85 cubic yards geometrically.
Is topsoil weight fixed per cubic yard?
No. Bulk density depends on soil composition, moisture and packing.
Related Calculators and Guides
Continue with a material-specific estimate, convert units, or review the calculation behind your result.