Topsoil Calculator
Enter your bed area and depth to see how many cubic yards of topsoil you need for planting and topdressing.
Beds: 6–12″; topdressing: ¼–½″.
How it works
Length × width × depth (in feet), divided by 27, gives cubic yards of topsoil. Add a little for settling.
Formula: (Length × Width × Depth÷12) ÷ 27 = cubic yards
Good for
- Raised garden beds
- New lawn installation
- Lawn topdressing
- Filling low spots
Tips
- For raised beds, 6–12″ of quality screened topsoil gives roots room to grow.
- Screened topsoil is finer and better for seeding; unscreened is cheaper for bulk grading.
- New lawns usually get 4–6″ of good topsoil.
References
Estimates use standard industry volume math. Cross-check your numbers against the pros:
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Open calculator →Topsoil Calculator FAQ
How much topsoil do I need for a garden bed?
For a 6-inch raised bed, plan about 0.5 cubic yards per 100 sq ft. Use the calculator with your exact area and depth.
What depth of topsoil for grass?
New lawns usually get 4–6 inches of good topsoil; topdressing an existing lawn is ¼–½ inch.
Screened vs unscreened topsoil?
Screened topsoil is finer and better for seeding and beds; unscreened is cheaper for bulk grading and filling.