Homeowner calculator
Topsoil Calculator
Estimate topsoil for lawns, gardens, grading, and landscape projects, including cubic yards, bags, and cost.
How this topsoil calculator works
The calculator multiplies area by depth to estimate topsoil volume. It then converts cubic feet to cubic yards and estimates the number of bags if you are buying bagged topsoil.
Common topsoil depths
A thin lawn topdressing may use less than an inch. New garden beds, grading, and low-spot filling may need several inches depending on the project.
Related project planning tools
Finishing a landscape bed? Use the Mulch Calculator to estimate mulch after topsoil is placed.
Filling garden boxes instead? The Raised Bed Soil Calculator is better for raised bed dimensions.
For paths, drainage, or decorative areas, the Gravel Calculator can estimate volume and weight.
Repairing soil along a new fence line? Use the Fence Cost Calculator to estimate the fence materials first.
Frequently asked questions
How do I calculate how much topsoil I need?
Multiply the length and width of the area to get square feet, then multiply by desired depth. This calculator converts the result into cubic feet, cubic yards, bags, and cost.
How deep should topsoil be for a lawn?
For topdressing, a thin layer may be enough. For new lawns or filling low spots, you may need several inches depending on the condition of the existing soil.
How many cubic feet are in a cubic yard of topsoil?
There are 27 cubic feet in one cubic yard. Bulk topsoil is often sold by the cubic yard.
How many bags of topsoil are in a cubic yard?
It depends on bag size. For example, one-cubic-foot bags require 27 bags per cubic yard, while 1.5-cubic-foot bags require 18 bags per cubic yard.
Should I add extra topsoil for settling?
Yes. Soil can settle after rain, watering, and compaction. A small overage helps reduce the chance of coming up short.
Is topsoil the same as garden soil?
Not always. Topsoil is general surface soil, while garden soil may include added organic matter or amendments. Product quality and ingredients vary.
Is bulk topsoil cheaper than bagged topsoil?
Bulk topsoil is often more economical for large areas. Bagged topsoil is convenient for small repairs, small beds, and projects without delivery access.
Can I spread topsoil over existing grass?
A light topdressing can be spread over grass, but deep layers may smother existing turf. For lawn repair, keep the layer appropriate for your goal.
How much topsoil do I need to level a yard?
That depends on the area and average fill depth. Measure several low spots and use an average depth for a planning estimate.
Should I screen topsoil before using it?
Screened topsoil is often easier to spread and may contain fewer rocks, clumps, and debris. It can be useful for lawns and finished landscape areas.
Is bulk topsoil better than bags?
Bulk is usually more practical for large areas. Bags are convenient for small repairs and garden projects.
Should I account for settling?
Yes. Soil can settle after rain, watering, and compaction.