How many 40lb bags of topsoil in a cubic yard?

One cubic yard of topsoil equals approximately 54 bags of 40lb topsoil. At typical big-box pricing of $2 to $6 per bag, that means $108 to $324 per cubic yard in bags — often 2 to 5 times the cost of bulk topsoil delivered.

What is the difference between topsoil, fill dirt, and garden soil?

Topsoil is the natural upper layer of earth, rich in organic matter — ideal for lawns and planting. Fill dirt is subsoil without organic matter, used for grading and filling low spots, not for growing. Garden soil (potting mix) is a manufactured blend with compost and amendments, sold in bags, designed for raised beds and containers.

Topsoil Calculator: Cubic Yards & Bags for Any Bed

Q: How much topsoil do I need for a new lawn?

For a new lawn from scratch, you need 4 to 6 inches of quality topsoil. At 4 inches, you need 0.012 cubic yards per square foot, or about 1 cubic yard per 80 square feet. Use our calculator to get an exact estimate for your area.

Q: How deep should topsoil be for grass?

A minimum of 4 inches of topsoil is required for healthy grass growth. 6 inches is ideal — it gives roots more room, retains moisture better, and supports a lusher lawn. For overseeding or top dressing an existing lawn, 1 to 2 inches is sufficient.

Q: Does topsoil price include delivery?

No — bulk topsoil prices (typically $15 to $70 per cubic yard depending on type) are material-only. Delivery adds $50 to $150 per load depending on distance and supplier. Most suppliers have a minimum order of 1 to 3 cubic yards for delivery.

Topsoil & Fill Calculator

Results update as you type

Area Shape

Length (ft)

Width (ft)

Depth (inches) — 4–6 in for new lawn, 1–2 in for top dressing

Topsoil Type

Estimates only. Add 10–15% extra for waste and settling. See Terms of Use.

How We Calculate This +

Formula

Area × (Depth ÷ 12) ÷ 27 = Cubic Yards

Key Assumptions

Weight: unscreened 1.3 t/cu yd · screened 1.4 t/cu yd · premium blend 1.4 t/cu yd
Compaction factor 1.10 applied when “Include compaction” is enabled

Price ranges based on national averages from HomeGuide, Angi, and LawnStarter. Updated May 2026.

Recommended Topsoil Depth by Application

Use Case	Recommended Depth
New lawn (from scratch)	4–6 inches
Overseeding / top dressing	1–2 inches
Garden beds (annuals & perennials)	6–8 inches
Raised beds (full fill)	10–12 inches
Fill / grading (low spots)	6+ inches + cap with quality soil
Vegetable gardens	8–12 inches

ⓘ Use the topsoil calculator above with the quick depth chips to compare quantities for each scenario.

How to Use the Topsoil Calculator

1 Choose your shape — Rectangle for most lawns and beds, circle for round garden features.
2 Enter dimensions in feet — Measure length × width for rectangles, or the radius for circular areas.
3 Set depth — Use the quick-select chips or type your own. 6 inches is ideal for a new lawn; 4 inches minimum.
4 Pick your topsoil type — The cost estimate adjusts instantly. Add $50–$150 to your budget for delivery.

Frequently Asked Questions

How much topsoil do I need for a new lawn? +

For a new lawn from scratch, plan for 4 to 6 inches of quality topsoil. At 4 inches, you need roughly 1 cubic yard per 80 square feet. At 6 inches (the ideal depth), you need 1 cubic yard per 54 square feet. Use the calculator above to get an exact figure for your lawn.

How deep should topsoil be for grass? +

Grass roots need a minimum of 4 inches of topsoil to establish properly. 6 inches is ideal — it gives roots more room, retains moisture better in dry spells, and supports a denser, healthier lawn. For overseeding an existing lawn or top dressing, 1 to 2 inches is sufficient.

Topsoil vs fill dirt vs garden soil: what’s the difference? +

Topsoil is the natural upper layer of earth (typically 4–12 inches deep), rich in organic matter and microorganisms — ideal for lawns, planting beds, and grading. Fill dirt is subsoil scraped from below the topsoil layer, low in organic matter, used for structural filling and grading where plant growth isn't needed. Garden soil (or potting mix) is a manufactured blend with compost and amendments, sold in bags, designed for raised beds and containers but too light and expensive for large areas.

How many 40lb bags of topsoil equal one cubic yard? +

One cubic yard of topsoil equals approximately 54 bags of 40lb topsoil. At typical big-box store pricing of $2–$6 per bag, that's $108–$324 in bags per cubic yard — compared to $15–$70 per cubic yard for bulk topsoil (before delivery). For orders of 2 cubic yards or more, bulk delivery is almost always cheaper.

Does topsoil price include delivery? +

No — bulk topsoil prices ($15–$70 per cubic yard depending on type) are material only. Delivery typically adds $50–$150 per load depending on distance and supplier. Most landscape suppliers have a minimum order of 1–3 cubic yards for delivery. For small quantities (1 cubic yard or less), renting a truck and picking up may be more cost-effective.

How to Calculate How Much Topsoil You Need

The formula for topsoil volume is straightforward: multiply your area in square feet by the depth in feet, then divide by 27 to convert cubic feet to cubic yards. For example, a 20×15 foot lawn at 6 inches (0.5 feet) deep needs 300 × 0.5 = 150 cubic feet, or 150 ÷ 27 = 5.56 cubic yards.

Bulk Topsoil vs. Bagged Topsoil: Which Should You Buy?

For projects requiring more than 2 cubic yards, bulk delivery is almost always cheaper. A typical order of 5 cubic yards of screened topsoil ($25–$50/cy) costs $125–$250 in material plus $50–$150 delivery — a total of $175–$400. The equivalent in 40lb bags (270 bags × $4 average) would run $1,080 — more than twice the cost. Reserve bagged topsoil for small patches, container fills, or when you need to carry material to a hard-to-access area.

Tips for Ordering Topsoil

Always order 10–15% more than your calculated amount to account for settling, waste, and uneven spreading.
Ask suppliers if their topsoil is screened (rocks and debris removed) — unscreened topsoil is cheaper but requires more prep work.
Check the delivery window: a full cubic yard dump is roughly a 3×3×3 foot pile. Plan where the truck will drop it.
For lawn projects, test your existing soil first. If pH or nutrients are off, topsoil alone won’t fix it — you may need amendments.

Ready to order? Use the topsoil calculator above ↑ to get your exact cubic yards and compare bulk vs. bagged costs.

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Topsoil Formula Explained

Step-by-step math for rectangular, round & L-shaped beds