There is a moment that catches every new lawn project, every raised garden bed and every backyard regrade off guard: standing in front of a supplier's price list trying to figure out how many cubic yards of topsoil to actually order. Order too little and you are back on the phone mid-project with the bed half-filled. Order too much and you have a small mountain of dirt sitting in the driveway for weeks.
Topsoil math is genuinely simple once you know three numbers — 27 cubic feet in a cubic yard, about 2,000 pounds in that yard, and roughly 108 square feet of coverage at 3 inches deep. This guide walks through the formula, a full coverage chart, the bag-size conversions, what topsoil actually weighs (it is heavier than you think), what it costs, and the difference between regular topsoil, screened topsoil and garden soil — terms that get used interchangeably and absolutely should not be.
Topsoil is sold by volume. Multiply length × width × depth (depth in feet, so inches ÷ 12), then divide by 27 to get cubic yards — and add 10 to 15 percent for settling. One cubic yard covers about 108 sq ft at 3 inches deep, or 54 sq ft at 6 inches. A yard weighs roughly 2,000 lbs (1 ton), about twice as heavy as mulch. Bulk delivery wins on price above 1.5–2 cubic yards.
The Quick Answer
Three numbers run all of topsoil math, and if you only remember these you can ballpark any project from a phone call:
- 1 cubic yard = 27 cubic feet — the master conversion that drives every calculation.
- 1 cubic yard covers about 108 sq ft at 3 inches deep — the figure most lawn and bed projects key off.
- 1 cubic yard weighs about 2,000 lbs — one ton, and about double the weight of mulch. This is the number that catches people out.
The first runs the math. The second runs your order. The third runs your delivery options and, in the case of a raised bed, the structural support it needs to handle the weight.
How to Calculate Topsoil
The step-by-step is straightforward:
- Measure the area in square feet. Length × width for a rectangle; split irregular shapes into rectangles and add them up.
- Decide a depth in inches. Topsoil usually goes deeper than mulch (the next section covers the depth recommendations).
- Convert depth to feet by dividing inches by 12 — the formula needs every measurement in the same units.
- Multiply length × width × depth-in-feet for cubic feet, then divide by 27 for cubic yards.
- Add 10 to 15 percent for settling. Topsoil settles as it absorbs water and gets walked on, more so than mulch. Skipping this step is the most common reason a raised bed ends up an inch low at the start of the season.
Depth: 12 inches ÷ 12 = 1 ft
Cubic feet: 32 × 1 = 32 cu ft
Cubic yards: 32 ÷ 27 ≈ 1.19 cu yd
With 15% settling: 1.19 × 1.15 ≈ 1.37 cu yd — round up to 1.5 yards
How Deep Should Topsoil Be?
Depth depends entirely on what the topsoil is doing. Lawn top-dressing wants a thin scattering; raised beds want a foot or more. Here are the standard recommendations:
| Project | Recommended Depth | Yards per 1,000 sq ft |
|---|---|---|
| Lawn top-dressing (overseeding) | 0.25 – 0.5 inch | 0.8 – 1.5 yd³ |
| Lawn leveling (low spots) | 1 – 3 inches | 3.1 – 9.3 yd³ |
| New lawn over existing soil | 4 – 6 inches | 12.3 – 18.5 yd³ |
| New garden bed | 6 inches | 18.5 yd³ |
| Raised bed (shallow crops) | 6 – 10 inches | 18.5 – 30.9 yd³ |
| Raised bed (root vegetables) | 12+ inches | 37+ yd³ |
| Tree planting | Root ball depth + 50% | Varies |
For a new lawn over a stripped or barely-existing surface, 6 inches is the safe number — it gives grass roots room to establish without hitting compacted subsoil. Anything thinner and the roots stay shallow, the lawn stresses easily in dry spells, and you end up redoing the job in three years.
Topsoil Coverage Chart
This is the table to bookmark. It shows how many square feet a given amount of topsoil covers at each common depth — the answer to "how much area does a yard of topsoil cover" in one glance.
| Cubic Yards | At 1″ | At 2″ | At 3″ | At 4″ | At 6″ |
|---|---|---|---|---|---|
| 0.5 yd³ | 162 sq ft | 81 sq ft | 54 sq ft | 41 sq ft | 27 sq ft |
| 1 yd³ | 324 sq ft | 162 sq ft | 108 sq ft | 81 sq ft | 54 sq ft |
| 2 yd³ | 648 sq ft | 324 sq ft | 216 sq ft | 162 sq ft | 108 sq ft |
| 3 yd³ | 972 sq ft | 486 sq ft | 324 sq ft | 243 sq ft | 162 sq ft |
| 5 yd³ | 1,620 sq ft | 810 sq ft | 540 sq ft | 405 sq ft | 270 sq ft |
| 10 yd³ | 3,240 sq ft | 1,620 sq ft | 1,080 sq ft | 810 sq ft | 540 sq ft |
The key reference line: one cubic yard of topsoil covers a 1,000 sq ft lawn to a depth of one-third of an inch. Multiply from there. A typical 4-inch new-lawn install over 1,000 sq ft needs about 12 yards — a number worth knowing before you start phoning suppliers.
How Much Does a Yard of Topsoil Weigh?
This is the answer that surprises almost everyone: a cubic yard of topsoil weighs about 2,000 pounds — one ton. That is roughly double the weight of mulch (which runs 600 to 1,000 lbs per yard), and the difference matters enormously the moment you start thinking about delivery, transport, or what kind of structure has to hold the soil in place.
The exact figure shifts with the type of topsoil and how wet it is:
| Topsoil Type / Condition | Weight per Cubic Yard |
|---|---|
| Standard topsoil (moderately moist) | 1,800 – 2,200 lbs |
| Screened topsoil (moderately moist) | 1,800 – 2,200 lbs |
| Sandy or dry topsoil | 1,500 – 1,800 lbs |
| Clay-heavy topsoil | 2,000 – 2,500 lbs |
| Wet or saturated topsoil | 2,500 – 3,000 lbs |
| Topsoil-compost garden mix | 1,200 – 1,500 lbs |
A standard half-ton pickup is rated for around 1,000 to 1,500 lbs of payload — which means it tops out at less than one cubic yard of topsoil. A three-quarter-ton truck handles around a yard and a half. Anything more, and you are looking at a dump-truck delivery, multiple trips, or a real risk of overloading the vehicle (which damages the suspension and is genuinely unsafe). When in doubt, pay for the delivery — it is cheaper than a broken spring.
The weight also matters for raised beds. A standard 4 by 8 raised bed filled 12 inches deep holds about 1.5 cubic yards of topsoil, which is around 3,000 pounds — roughly a ton and a half resting on your bed frame. Lightweight cedar or thin-board beds need bracing; deep beds over 12 inches almost always do.
Bags vs Bulk
Topsoil bags vary more in size than mulch bags. The most common is the 40-pound bag at about 0.75 cubic feet, though you will also find 1.0, 1.5 and 2.0 cubic foot bags depending on brand. Here is what each works out to per cubic yard:
| Bag Size | Bags per Cubic Yard | Coverage per Bag (at 3″) |
|---|---|---|
| 0.75 cu ft (40-lb — most common) | 36 bags | 3 sq ft |
| 1.0 cu ft | 27 bags | 4 sq ft |
| 1.5 cu ft | 18 bags | 6 sq ft |
| 2.0 cu ft | 14 bags (13.5 rounded up) | 8 sq ft |
The crossover between bags and bulk for topsoil sits around 1.5 to 2 cubic yards. Below that, the convenience of bags usually wins, especially if access for a delivery truck is tight. Above it, bagged topsoil starts to look genuinely expensive (more on that in the next section). A standard pallet of 0.75 cu ft topsoil bags holds about 60 bags — roughly 1.7 cubic yards — which puts a full pallet right at the bagged-versus-bulk crossover.
How Much Does Topsoil Cost?
The bulk price you will see most often is $15 to $50 per cubic yard delivered, depending on the type of topsoil and your region. Premium screened topsoil sits at the upper end; unscreened fill dirt is at the bottom; garden soil mixes are a step up again. Delivery charges run roughly $50 to $150 per load and are often waived above 3 to 5 cubic yards.
By type, rough averages:
- Unscreened fill dirt: $10 to $20 per cubic yard — the cheapest option, suitable only for grading, not planting.
- Standard topsoil: $15 to $35 per cubic yard — the everyday choice for lawns and beds.
- Screened topsoil: $25 to $50 per cubic yard — cleaner and more uniform, typically 20–50 percent more than unscreened.
- Garden soil / raised-bed mix: $40 to $80 per cubic yard — topsoil already blended with compost and amendments.
Bagged topsoil is the expensive way to buy it. A 0.75 cu ft (40-lb) bag at $3 to $6 works out to around $108 to $216 per cubic yard equivalent — four to ten times the bulk rate. The convenience of bags can be worth that markup on small projects, but if you are buying more than two pickup-loads' worth, bulk is almost always the right financial choice.
Skip the arithmetic
Enter your area and depth, and the calculator returns cubic yards, bags and an order estimate — free, no sign-up. The cubic yard calculator handles any other material sold by the yard.
Topsoil vs Screened Topsoil vs Garden Soil
These terms get used interchangeably at the garden center, but they are not the same material and they are not interchangeable for the job at hand. Picking the wrong one is the most common topsoil mistake. Here is what each actually is:
| Type | What It Is | Best For |
|---|---|---|
| Unscreened topsoil | Raw natural soil with rocks, roots and clumps still in it | Building up grade, fill behind retaining walls |
| Screened topsoil | Topsoil run through a screen to remove debris and clumps | Lawns, garden beds, anywhere surface matters |
| Garden soil | Topsoil blended with compost and amendments | Planting beds, established gardens |
| Raised-bed mix | Garden soil formulated specifically for raised beds, often with peat or coir | Filling new raised beds |
| Compost | Decomposed organic matter, not actually soil | Amending existing soil; never used alone |
| Potting mix | Soilless or low-soil blend designed for drainage | Containers and pots only |
| Fill dirt | Subsoil from below the topsoil layer — no nutrients | Pure grading and leveling — NEVER planting |
The most common mix-up is between topsoil and fill dirt. Fill dirt is cheaper, looks similar, and is sometimes mislabeled at smaller yards — but it has no nutrients, no organic matter and no biology. Plants will not thrive in it. Use it for building grade or filling around a foundation; never use it where you intend to grow anything.
The second most common is buying garden soil where plain topsoil would do, and paying twice the price for the compost you would have added anyway. For a new lawn or a base layer in a raised bed, regular screened topsoil is usually the right choice — add your own compost on top if you want the richer mix.
Common Mistakes & Settling
The mistakes that turn a topsoil project into a redo:
- Forgetting the settling allowance. Topsoil compacts as it absorbs water and gets walked on — plan on 10 to 15 percent settlement, and up to 25 percent for compost-heavy mixes. A bed that looks perfect on day one is an inch low by mid-summer if you skip this.
- Using fill dirt where topsoil belongs. Cheaper, but plants will not establish. Worth the price difference every time for anything growing.
- Topsoil over compacted subsoil. A new 6-inch layer of topsoil on rock-hard, untilled subsoil drains badly and the roots run sideways instead of down. Break up the existing surface first with a fork or tiller.
- Buying premium garden soil for everything. Garden soil is for planting beds. Lawn base and grade work want plain topsoil at half the price.
- Topsoil over chemically treated turf. Residual lawn herbicides can persist in the soil layer above and stunt new plantings. If a lawn was recently treated, give it a season before reworking it.
"Topsoil weighs about twice what mulch does. The pickup that carried two yards of mulch last weekend will struggle with one yard of this."— The weight number that matters most
Once you have your area and depth, the Topsoil Calculator turns them into cubic yards, bags and a delivery estimate. The Cubic Yard Calculator handles any other material sold the same way — mulch, gravel, sand or compost.
Key Takeaways
- The formula: area × depth (in feet) ÷ 27 = cubic yards. Add 10–15% for settling.
- One cubic yard covers about 108 sq ft at 3 inches deep, 54 sq ft at 6 inches.
- A cubic yard of topsoil weighs roughly 2,000 lbs — about twice as heavy as mulch.
- A standard half-ton pickup tops out at less than one yard of topsoil. Anything more wants a delivery.
- One cubic yard equals 36 bags of standard 0.75 cu ft (40-lb) topsoil, 18 of the 1.5 cu ft bags, or 14 of the 2.0 cu ft bags.
- Bulk runs $15–$50 per yard delivered. Bagged works out to $108–$216 per yard equivalent — four to ten times more.
- Screened topsoil is the right choice for lawns and beds; fill dirt is grading material only and will not grow plants.
