Topsoil Calculator

Multiply length × width × depth in feet to get cubic feet, then divide by 27. Example: 40 ft × 25 ft × (4/12) ft = 333 cu ft ÷ 27 = 12.3 cubic yards. For circles use π × radius² × depth ÷ 27. Our calculator does this automatically with your waste allowance.

Apply 4–6 inches of topsoil over the graded area. A 1,000 sq ft lawn at 4 inches needs about 12.3 cubic yards. Till or rake the topsoil into the subsoil interface for better root establishment before seeding or sodding.

Plan 6–8 inches minimum for vegetables and flowers; 10–12 inches for root crops like carrots. Raised beds can be filled entirely with a topsoil-compost blend. Our garden preset uses 8-inch depth as a starting point.

Local delivery of 3–8 cubic yards typically runs $75–$125 in 2026. Orders over 10 cubic yards often qualify for reduced or free delivery. Our calculator adds a $110 delivery allowance on loads under 10 cubic yards when delivery is selected.

Bulk topsoil costs $25–$45 per cubic yard. Bagged topsoil at $4 per cubic foot equals about $108 per cubic yard — nearly 3× the bulk price. Use bags only for small patches under 2 cubic yards.

Topsoil is the upper organic layer suitable for planting — screened, dark, and rich in nutrients. Fill dirt is subsoil used for grading and raising elevation; it compacts well but lacks organic matter for grass and gardens. Never plant directly in unamended fill dirt.

Yes for gardens — mix 20–30% compost into topsoil for improved drainage and fertility. For lawns, 1 inch of compost tilled into the top 4 inches of topsoil before seeding dramatically improves establishment. Straight compost alone is too rich and compacts.

Seed or sod immediately after final grading and light compaction with a roller. Water daily until grass establishes. Avoid heavy foot traffic for 3–4 weeks after seeding. Spring and early fall are the best planting windows in most US climates.