How Do I Calculate How Much Topsoil I Need?
Multiply length × width × depth (in feet), divide by 27 for cubic yards. One cubic yard covers about 108 square feet at 3 inches deep, or 81 square feet at 4 inches. Screened topsoil weighs about 1.1 tons per cubic yard. Add 5–10% for settling and uneven ground.
Topsoil is sold by the cubic yard for bulk delivery or by the bag for small projects. One cubic yard covers about 108 square feet at 3 inches deep, or 81 square feet at 4 inches deep. Knowing your area dimensions and target depth gives you an accurate order quantity so you avoid costly second deliveries.
Formula:Length (ft) × Width (ft) × Depth (in) ÷ 12 ÷ 27 = Cubic Yards. Multiply by density (tons per cubic yard) to convert to tons. Add 5-10% for waste, settling, and uneven ground.
How Deep Should Topsoil Be for Different Projects?
New lawns need 4–6 inches of screened topsoil; garden beds need 6–8 inches; raised beds need 12–18 inches from scratch. Lawn leveling and overseeding require only 1–2 inches. Sod prep calls for 4–6 inches of quality screened material.
- Lawn leveling and overseeding: 1-2 inches
- New lawn installation (over existing soil): 4-6 inches
- Garden beds and flower borders: 6-8 inches
- Raised beds (filling from scratch): 12-18 inches
- Grading and filling low spots: varies — measure the deepest point
- Sod preparation: 4-6 inches of quality screened topsoil
What Is the Difference Between Topsoil, Garden Mix, and Compost?
Screened topsoil is the all-purpose choice for lawns and grading. Garden mix blends topsoil with compost for better nutrients and drainage — ideal for vegetable gardens. Compost blend is lightest and richest in organic matter but too loose for grading on its own.
Screened topsoil has been sifted to remove rocks, roots, and debris. It is the best all-purpose choice for lawns, grading, and general landscaping. Unscreened topsoilis cheaper but contains small stones and organic matter — fine for fill but not ideal for planting beds.
Garden mix (also called planting mix) blends topsoil with compost and sometimes perlite for improved drainage and nutrients. It is lighter (about 1.0 tons per cubic yard) and best for vegetable gardens, flower beds, and container plantings. Compost blendis the lightest option (0.8 tons per cubic yard) and is rich in organic matter — excellent as a soil amendment mixed into existing beds, but too loose to use alone for grading.
Sandy loam drains well and is ideal for lawns in clay-heavy areas. It sits between screened topsoil and garden mix in both weight and nutrient content.
Is Bulk or Bagged Topsoil Cheaper?
Bulk topsoil costs $25–50 per yard; bagged costs $150–200 per yard equivalent. For quantities over 3 yards, bulk delivery saves significant money. A standard dump truck delivers 10–15 cubic yards.
A standard dump truck delivers 10-15 cubic yards of topsoil. For quantities under 3 yards, most suppliers offer pickup by the scoop. Bagged topsoil (typically 1 cubic foot per bag) costs significantly more per yard — about $150-200 per cubic yard equivalent vs. $25-50 per yard for bulk delivery.
Always ask your supplier whether the topsoil is screened, where it is sourced, and whether it has been tested for pH and contaminants. Quality varies widely between suppliers. For vegetable gardens, request a soil test report or plan to amend with compost and lime after delivery.
How Much Topsoil for a 1,000 Sq Ft Lawn?
A 1,000 sq ft lawn needs about 12.4 cubic yards of topsoil at 4 inches deep, or 18.5 cubic yards at 6 inches. Standard recommendation for new lawn installation is 4–6 inches of screened topsoil over compacted subgrade. Add 5–10% for settling — topsoil compresses about 10% over the first growing season.
How Much Topsoil for a Raised Garden Bed?
A 4×8-foot raised bed 12 inches deep needs 1.18 cubic yards of garden mix or screened topsoil. An 8×8-foot bed at the same depth needs 2.37 cubic yards. For better vegetable production, blend 50% screened topsoil + 30% compost + 20% peat or coco coir — the so-called “Mel's Mix” ratio adapted for cost.
How Many Bags of Topsoil Are in a Cubic Yard?
One cubic yard equals 27 cubic feet. With standard 1-cu-ft bags of topsoil, that's 27 bags per cubic yard. Many bagged topsoils come in 0.75-cu-ft bags — 36 of those fit a cubic yard. Bulk delivery is 4–6× cheaper per cubic yard for any quantity over 2 yards.
What's the Difference Between Topsoil and Garden Soil?
Topsoil is the sifted upper layer of native soil — basic organic matter for grading and lawns. Garden soil (also called planting mix) is topsoil amended with compost, peat, and sometimes fertilizer for better plant performance. Use topsoil for grading, lawns, and bulk fill; use garden soil specifically in vegetable beds and flower borders where roots will live.
Cost varies by region. The Estimated Material Cost card pulls from our indicative national-average pricing dataset(refreshed quarterly). Northeast and California metros run 15–40% above the national midpoint while Midwest and Southeast metros run 5–15% below — verify locally for binding quotes.
How Much Does Bulk Topsoil Cost?
Bulk topsoil averages about $35.00 per cubic yard nationally as of our April 2026 research. Screened $25-45/cu yd; unscreened loam $15-30; organic/compost $40-70. Regional variation is significant — Northeast and California metros run 15–40% above the national midpoint while Midwest and Southeast metros run 5–15% below. See our pricing methodology for sources and confidence tiers.
Related Calculators
- Mulch Calculator— Estimate mulch for beds and tree rings
- Sand Calculator— Calculate sand for fill and bedding
Written by Daniel McCarney — AceCalc