Topsoil Math: The 2026 Guide to Cubic Yards, Depths, and Ordering

Topsoil is the least glamorous material in landscaping and the one most often mis-ordered, because it is sold by volume, priced by volume or weight, and needed in depths that range from a dusting to a foot. Order short and the project stalls halfway through the second yard; order long and you own a small hill. This guide works through the entire estimate: the area-times-depth formula, why 324 is the only conversion number most people need, which depths suit which projects, what a cubic yard weighs at the commonly cited densities, and where bags beat bulk. A topsoil calculator at /topsoil-calculator.html does the arithmetic in seconds — the tape measure, the depth decision, and the phone call to the yard are still yours. Every figure here is a planning estimate; your region's soil and your supplier set the final numbers.

SECTION 01What a Topsoil Calculator Does

The task is volumetric: convert a surface area and a target depth into cubic yards, the unit bulk soil is sold in. The inputs are length and width in feet, the depth in inches, and — for weight estimates — a density in tons per cubic yard. The output is a quantity to order, plus an honest margin for settling and uneven ground. That is the whole machine, and its accuracy depends entirely on the two measurements only you can supply.

What the calculator cannot do is walk your yard. It does not know that the back third sits six inches low, that the builder left subsoil and rubble where a lawn should be, or that half the area is actually a mulched bed that needs nothing. Survey the space before you compute: pace or tape the dimensions, note where depth varies, and split the yard into zones with different depths if the terrain is honest about it. A five-minute walk is the difference between an estimate and a guess wearing a calculator's clothing.

SECTION 02The Core Formula and Why 324 Matters

The formula is simple enough to carry in your head: cubic yards equal area in square feet, times depth in inches, divided by 324. A 1,000 square foot lawn dressed at 2 inches needs 1,000 times 2 over 324, which is about 6.2 cubic yards. The division by 324 is the unit conversion in disguise: one cubic yard is 27 cubic feet, and 27 cubic feet spread at one inch — one twelfth of a foot — covers 27 times 12, or 324 square feet.

Two neighboring conversions round out the set. Multiply cubic yards by 27 for cubic feet, the unit bagged soil is sold in; and remember that 324 square feet at one inch is your universal sanity check — one yard covers a 18 by 18 foot square an inch deep. Working the formula by hand once is worth the effort, because it exposes the two common input errors instantly: forgetting to convert depth from inches, or computing area in square yards and dividing again. Keep everything in square feet until the final division, and let /topsoil-calculator.html verify the result.

SECTION 03Choosing Depth: The Decision That Drives Everything

Depth is where projects differ, and the commonly recommended ranges are worth internalizing. Topdressing an existing lawn means a quarter to half an inch — enough to feed and level without smothering the grass. Overseeding pairs with the same shallow depths. Establishing a new lawn from seed or preparing for sod calls for 4 to 6 inches of loose, workable soil over whatever the builder left. Raised vegetable beds want 6 to 12 inches minimum, and fixing grade problems — low spots, swales, drainage paths — depends on the survey, not a norm.

The depth decision interacts with the area in a way that surprises people: doubling depth doubles the order, while doubling the area does the same, so a thin layer over a big yard and a deep bed over a small one cost the same. A 5,000 square foot lawn at 4 inches and a 1,000 square foot garden at 20 inches both land near 60 cubic yards. Decide depth per zone, compute per zone, and add the zones; averages hide the places that actually need the soil.

SECTION 04Weight and Density: What a Cubic Yard Weighs

Volume decides what you order, but weight decides how it arrives. Topsoil is commonly cited at roughly 1.0 to 1.35 tons per cubic yard depending on moisture and composition, with the heavier end typical for wet, clay-rich material and the lighter end for dry, sandy, or well-screened blends. A 6.2 yard topdressing order at the commonly used 1.35 tons per yard therefore weighs about 8.4 tons — worth knowing before anyone volunteers a wheelbarrow.

Weight matters for three practical reasons. Delivery trucks have real limits, and large orders arrive in multiple loads — a typical dump truck handles a load measured in the tens of yards, so a 60-yard job is a multi-truck day. Piles have footprints; ten yards dumped in a driveway is a structural event for the pavement and a logistics problem for the shovel. And weight is what you pay for in labor: at roughly 2,000 pounds per yard, every yard is about the weight of a compact car, which is why amortizing it across bags versus bulk is a decision with a calculator attached.

SECTION 05Bags Versus Bulk: Where the Line Sits

Bagged soil comes most commonly in 1 cubic foot bags around 40 pounds, with 1.5 and 2 cubic foot sizes alongside. The conversion is fixed: 27 one-cubic-foot bags make a cubic yard, so a raised bed needing 1.2 yards is 32 one-cubic-foot bags, 21 or 22 of the 1.5s, or 16 of the 2s. Bags shine for small jobs, tight access where a truck cannot reach, staged weekend work, and situations where you want to carry soil around the side of the house one armload at a time.

Bulk wins past roughly the 1 to 2 yard mark on price per yard, waste, and back health — though the exact crossover depends on local pricing, and bag sales make small quantities possible at all. The classic mistake runs in both directions: buying dozens of bags for a 10-yard lawn renovation, which triples the cost and the lifting, or ordering a full dump truck of soil for a project that needed three yards and now owns a mountain. Compute the volume honestly, price both routes locally, and let the total, not habit, decide.

SECTION 06Soil Quality: Screened, Blended, and Sold As

Topsoil is a category, not a specification. Screened topsoil has been passed through a mesh to remove stones and clods — the default choice for lawns and beds. Unscreened material is cheaper and lumpier and suits deep filling where the surface will be raked later. Beyond texture, the honest concerns are composition and contamination: fill dirt sold as topsoil, salty or herbicide-carrying soil from unknown sources, and the sandy-versus-clayey character that determines how your particular yard drains and holds nutrients.

Blends are where projects get specific: topsoil mixed with compost at commonly recommended ratios of roughly 25 to 50 percent compost for vegetable beds, and leaner mixes for lawns. A soil test through a local extension office settles pH and nutrient questions for the cost of a mailing envelope, which is cheaper than amending blind. None of this changes the volume arithmetic — a yard is a yard regardless of blend — but it changes what the yard is worth, and it is the reason two quotes for the same quantity can differ by a factor of two.

SECTION 07Ordering, Settling, and When to Call a Professional

Add margin to the computed volume: 5 to 10 percent is the commonly recommended allowance for settling, uneven subgrade, and the edges where depth creeps up. Loose delivered soil fluffs to more volume than it will occupy after rain and foot traffic compact it, and low spots always claim more than the survey promised. Round up to whole yards, confirm whether the supplier sells by the cubic yard or by weight, and schedule delivery for when the ground is workable — not a swamp, not concrete-dry.

Bring in professional help when the volumes or stakes outgrow the shovel: grade corrections that direct water toward or away from foundations, jobs above roughly 10 yards that justify machine spreading, any excavation near utilities, and sites where drainage engineering matters. Call 811 before digging anywhere, per the standard practice across the United States. For everything else, measure honestly, compute at /topsoil-calculator.html, order with margin, and treat the delivery driver's pile as the beginning of the project rather than the end of the planning.

SECTION 08Scenario 1: Topdressing a 1,000 Square Foot Lawn

Topdressing means a shallow layer — plan 2 inches for a lawn being smoothed and fed alongside overseeding. The area is 1,000 square feet, so the volume is 1,000 times 2 divided by 324, which equals 6.17 cubic yards. Add the commonly recommended 5 to 10 percent for settling: 6.17 times 1.10 is 6.8, so the order rounds to 7 yards.

The weight check matters here: 6.8 yards at roughly 1.35 tons per yard is about 9.2 tons — a truckload, not a wheelbarrow project, and confirmation that bulk is the only sane route. Cost per yard varies regionally, but the shape of the decision does not: at shallow depths over large areas, volume climbs fast, and the 324 divisor is what keeps the estimate honest. If the lawn is only being spot-leveled, compute the low spots separately and the total will shrink dramatically.

SECTION 09Scenario 2: A 4 by 8 Foot Raised Bed, 12 Inches Deep

The bed is 4 by 8 feet and wants a full foot of soil. Area is 32 square feet, and depth of 12 inches converts to exactly 1 foot, so volume is 32 times 1.0, or 32 cubic feet. Divided by 27, that is 1.19 cubic yards — call it 1.25 to 1.5 ordered with margin, since beds settle more than lawns.

This is the natural bags-versus-bulk boundary case. In bags: 32 one-cubic-foot bags, or 16 of the 2-cubic-foot size, or about 22 of the 1.5s — an afternoon of car trips and lifting, roughly 1,280 pounds of soil at the common 40-pound bag. In bulk, 1.25 yards may be below some suppliers' delivery minimums, which is precisely when bags win despite the price per yard. Run the real numbers both ways at /topsoil-calculator.html before choosing; the honest crossover point is local.

SECTION 10Scenario 3: A Circular Bed 15 Feet Across at 3 Inches

A 15-foot-diameter circle has a 7.5-foot radius, and area is pi times radius squared: 3.14 times 7.5 times 7.5, or about 177 square feet. At 3 inches deep, volume is 177 times 3 divided by 324, which equals 1.64 cubic yards — order 2 with margin.

The circle teaches the radius habit: measure to the center, not across, because the squaring punishes confusion. It also shows why ornamental beds are cheap to amend and lawns are not — the same 3-inch depth over the 1,000-square-foot lawn from Scenario 1 would need 9.3 yards rather than 1.6. Weigh the order before planning transport: even 2 yards is roughly 2.7 tons, which arrives by truck or not at all.

SECTION 11Scenario 4: A New 5,000 Square Foot Lawn at 4 Inches

New lawns want 4 to 6 inches of workable soil; take 4. Volume is 5,000 times 4 divided by 324, which is 61.7 cubic yards — order 65 or so with settling margin. At the commonly cited 1.35 tons per yard, the delivery is about 83 to 88 tons, which is multi-truck territory and machine-spreading territory with it.

The bag comparison belongs in every big-job conversation, because it ends the argument: 61.7 yards is 1,666 one-cubic-foot bags — over $3,000 of bags in many markets, and roughly 66,000 pounds of car trips. Bulk at this scale is not a preference; it is the only arithmetic that survives contact with a calendar. This is also the scale where grading questions — slope away from the house, swales, drainage — deserve a professional eye before 80 tons of soil locks them in.

SECTION 12Scenario 5: A Half-Acre Lot Dressed at 1 Inch

An acre is 43,560 square feet, so half an acre is 21,780. At a 1-inch maintenance dressing, volume is 21,780 times 1 divided by 324, which equals 67.2 cubic yards — about 68 ordered, and roughly 92 tons at 1.35 tons per yard. The same lot at a half inch halves everything: 33.6 yards, about 45 tons.

The scenario's value is the acreage conversion chain: acres to square feet at 43,560 per acre, then the 324 divisor. Property-size shorthand — a quarter acre, a half acre — is where topsoil estimates most often go sideways, because people compute on the house lot including structures rather than the actual grass. Walk the area, subtract buildings and beds, and be honest about which portions need dressing at all; on large lots, zoning the job by depth is how 90 yards becomes 40.

SECTION 13Scenario 6: Blending Compost Into a 4-Yard Order

Vegetable beds benefit from compost blended into the topsoil, at commonly recommended rates of roughly 25 to 50 percent by volume. For a project that needs 4 cubic yards of finished mix at 25 percent compost: 3 cubic yards of topsoil plus 1 cubic yard of compost. At 50 percent, the split is 2 and 2. The volumes simply add; the calculator runs on the total, and the supplier quote runs on the split.

Two adjustments finish the order. First, blending fluffy compost into denser soil loses a little volume to mixing — another reason the 5 to 10 percent margin earns its keep. Second, order the two materials separately rather than accepting an unbranded garden mix, because the blend ratio is then verifiable: you know the 4 yards contains what you intended. Weight checks still apply — 4 yards of mix runs roughly 4 to 5 tons — and the delivery footprint is four wheelbarrow-days of work either way.

SECTION 14Checking Your Own Numbers

Every scenario used the same chain: square feet, times inches, divided by 324, plus a 5 to 10 percent margin, with weight estimated at roughly 1.35 tons per cubic yard and bags converted at 27 per yard. The unit juggling that appeared — inches to feet, square feet to acres at 43,560, cubic feet to cubic yards at 27 — is the complete set topsoil requires. If a hand calculation and the calculator disagree, the depth input and the area units are the first two suspects, in that order.

Then close the loop with the three reality checks: the weight, which decides trucks and labor; the footprint, which decides where the pile lives; and the access, which decides whether bulk is physically possible at all. Order with margin, confirm the supplier's selling unit, and walk the pile with a rake before signing anything. The arithmetic at /topsoil-calculator.html is exact; the dirt, as always, is approximate.

SECTION 15Mistake 1: Confusing Square Yards With Cubic Yards

The most common unit error in landscaping: area is measured in square yards, soil is sold in cubic yards, and the two are separated by an entire dimension. A patio quoted at 100 square yards and soil ordered at 100 cubic yards differ by a factor of 27 — literally the contents of 27 cubic feet per yard. The error usually enters through measuring in yards, then feeding yard-based numbers into a feet-based formula.

The fix is a one-unit discipline: measure everything in feet, compute area in square feet, apply depth in inches, and divide by 324 exactly once at the end. Never square the yards; never convert twice. If a supplier quotes per square yard of coverage at a stated depth, convert that too before comparing prices, because per-unit quotes in mixed units are how identical orders differ by double-digit percentages.

SECTION 16Mistake 2: Leaving Depth Out of the Estimate

The second classic: area computed carefully, depth estimated as whatever the pile looked like last time. Depth is half the formula, and it multiplies linearly — a 1,000 square foot job at 1 inch needs 3.1 yards, at 2 inches 6.2, at 4 inches 12.3, at 6 inches 18.5. Guessing depth is guessing the budget, the truck count, and the weekend.

Depth decisions deserve their own five minutes: a quarter to half inch for topdressing living grass, 4 to 6 inches for establishing a new lawn, 6 to 12 or more for raised beds, survey-driven amounts for grading. Walk the space with a ruler against the soil before computing, especially where grade varies, and compute zones separately when depth differs. Averages over a lumpy yard are how the low spots stay low and the order runs short.

SECTION 17Mistake 3: Tons and Yards on the Same Invoice

Some yards sell by the cubic yard, some by the ton, and some will quote either — which turns the density question into a pricing question. At the commonly cited 1.0 to 1.35 tons per cubic yard for topsoil, a per-ton price that looks cheaper than a per-yard price may be the more expensive order once the actual weight of a yard is accounted for, and wet-season deliveries weigh, and cost, more.

Normalize before comparing: ask the supplier what density they use, convert quotes to the same unit, and compare totals, not unit prices. The weight estimate also answers the practical questions — truck capacity, driveway load limits, wheelbarrow math — that volume alone hides. A 7-yard order at 1.35 tons per yard is about 9.5 tons of soil; knowing that before the truck arrives is worth the phone call.

SECTION 18Mistake 4: Ignoring Settling and the 5 to 10 Percent Margin

Delivered soil is fluffy; installed soil is not. Rain, foot traffic, and gravity compact a fresh topdressing noticeably within weeks, and low spots always consume more than the flat-yard survey promised — which is why the commonly recommended practice is adding 5 to 10 percent above the computed volume and rounding up to whole yards. Skipping the margin produces the ribbed, half-settled lawn that needs a second, smaller, more annoying delivery.

The margin also absorbs mixing losses when compost is blended in and the fluff factor when screened soil arrives airier than expected. Note what the margin is not: it is not a fudge factor for bad measuring, and doubling it does not fix a wrong depth input. Compute honestly, then add the standard margin, then round up once.

SECTION 19Mistake 5: Bags and Bulk Bought at the Wrong Scale

Two mirror-image errors. The first is bagging a bulk job: a 10-yard lawn renovation attempted in one-cubic-foot bags is 270 bags — thousands of pounds of trunk trips at a price per yard that can triple the material cost. The second is trucking a bag job: ordering a dump truck minimum for a project that needed 1.2 yards, and owning a soil mountain with no return policy.

The crossover sits around 1 to 2 cubic yards for most markets, shifted by delivery minimums, access, and whether the soil's destination is reachable by truck at all. Compute the volume first, price both routes locally second, and decide third. Bags retain real advantages at small scale — staged weekends, side-yard access, no pile to move twice — and bulk's advantages at large scale are not negotiable, only forgettable.

SECTION 20Mistake 6: Trusting the Word Topsoil on the Label

Volume mistakes waste money; quality mistakes waste the money and the season. The word topsoil describes a category, not a specification, and the market contains screened loam, unremarkable fill dirt, sandy spreaders' specials, and the occasional load with construction debris in it. A wrong-volume order costs a phone call; a wrong-soil order costs the plants, the seeding window, and the difference between a garden and a gravel garden.

Ask what the material is — source, screening, blend — before ordering, and inspect the pile on delivery: texture in the hand, smell, uniformity, and an absence of rubble. For lawns and beds where nutrition matters, a basic soil test through a local extension office costs a mailing envelope and answers the pH and nutrient questions the supplier cannot. Order quantity with the calculator; order quality with questions.

SECTION 21Pro Tips and When to Hire the Earthmoving

Measure the yard after rough grading, not before — the survey that counts is the one of the ground that actually exists when the truck arrives. Zone big projects by depth instead of averaging; walk the low spots with a ruler; and stage deliveries so spreading keeps pace with dropping, because piles that sit for a week grow weeds and lose the fluff that made them easy to move.

Keep a few bags on hand even on bulk jobs — for pots, for touch-ups, for the bed you forgot — and keep the delivery ticket with the pile, since disputes about volume are settled by measuring the cone: length times width times average height in feet, divided by 27. Photograph the pile before spreading begins; the photo is the only record of what arrived, and it has ended more arguments than any formula.

Hire professionals when grading directs water toward or away from a foundation, when the order exceeds what hand spreading can finish before rain, when machine access exists and the volume justifies it, and whenever excavation approaches buried utilities — with 811 called before any digging, per standard practice. Estimating and ordering stay yours throughout: run /topsoil-calculator.html, verify the units on the quote, and let the arithmetic argue with the salesman instead of you.

🔑 Key takeaways

• The core formula: cubic yards equal area in square feet times depth in inches, divided by 324 — one yard covers 324 square feet at one inch deep.
• Depth follows the project: a quarter to half inch for topdressing, 4 to 6 inches for new lawns, 6 to 12 or more for raised beds, survey-driven amounts for grading.
• Topsoil is commonly cited at roughly 1.0 to 1.35 tons per cubic yard depending on moisture and composition — a 6.2-yard order is about 8.4 tons.
• Twenty-seven 1-cubic-foot bags make a cubic yard; bags suit small jobs and tight access, bulk wins past roughly 1 to 2 yards.
• Add 5 to 10 percent for settling and uneven ground, round up to whole yards, and confirm whether the supplier sells by volume or by weight.
• Screened versus unscreened, blends with compost, and a basic soil test decide quality; volume arithmetic decides only quantity.
• Every figure here is a planning estimate — regional soil, supplier practice, and your yard's actual low spots set the final order.
• The chain never changes: square feet times inches divided by 324, plus 5 to 10 percent margin, with weight at roughly 1.35 tons per yard and 27 bags per yard.
• A 1,000-square-foot lawn at 2 inches needs about 6.2 yards — 7 ordered with margin, and roughly 9 tons delivered.
• A 4 by 8 foot raised bed at 12 inches is 32 cubic feet — 1.19 yards, or 32 one-cubic-foot bags — the classic bags-versus-bulk boundary case.
• A 15-foot circle at 3 inches takes 1.64 yards; measure to the center for the radius, because the squaring punishes confusion.
• A 5,000-square-foot lawn at 4 inches is 61.7 yards and over 80 tons — 1,666 bags by comparison, which is the whole bulk argument in one number.
• Half an acre at 1 inch is 67.2 yards: convert acres at 43,560 square feet each, then divide by 324, and zone the job by depth.
• These worked numbers are planning estimates; your supplier's selling unit and your yard's low spots write the final order.
• Soil is sold in cubic yards — a volume; areas in square yards are a different dimension entirely. Measure in feet, divide by 324 once, at the end.
• Depth is half the formula: a quarter to half inch for topdressing, 4 to 6 inches for new lawns, 6 to 12 or more for raised beds — measured, not remembered.
• Normalize units before comparing quotes: at roughly 1.0 to 1.35 tons per cubic yard, per-ton and per-yard prices are only comparable after conversion.
• Add 5 to 10 percent for settling, low spots, and mixing losses, then round up to whole yards — and know the margin is not a fix for a wrong depth input.
• The bags-versus-bulk crossover sits around 1 to 2 cubic yards; 270 bags is a bulk job, and a truck minimum is not a bag job.
• Interrogate the word topsoil: ask for source, screening, and blend, inspect the pile on delivery, and soil-test through a local extension office when nutrition matters.
• Every figure here is a planning estimate — your yard's actual contours and your supplier's units set the final order.

❓ Frequently asked questions

How many cubic yards of topsoil do I need for 1,000 square feet?

At 2 inches deep, 1,000 times 2 divided by 324 is about 6.2 cubic yards — order 6.5 to 7 with settling margin. At 4 inches the same area needs roughly 12.3 yards, which is why the depth decision drives everything.

Why does the formula divide by 324?

One cubic yard is 27 cubic feet, and 27 cubic feet spread one inch deep — one twelfth of a foot — covers 27 times 12, or 324 square feet. The divisor converts square-feet-times-inches directly into cubic yards.

How much does a cubic yard of topsoil weigh?

Commonly cited figures run roughly 1.0 to 1.35 tons per cubic yard depending on moisture and composition, with wet, clay-heavy soil at the heavy end. Assume closer to 1.35 tons when planning deliveries and wheelbarrow routes.

Should I buy bagged topsoil or order bulk?

Bags suit jobs under roughly 1 to 2 cubic yards, tight side-yard access, and staged weekend work; bulk wins on price and labor past that mark. Twenty-seven 1-cubic-foot bags equal one yard, so run the comparison on your actual volume.

How much extra topsoil should I order?

Five to 10 percent above the computed volume for settling, uneven subgrade, and edge creep. Loose soil also fluffs larger than it will sit after compaction, so the margin absorbs both the survey's optimism and the rain's corrections.

Is all topsoil sold as topsoil the same?

No. Screened, unscreened, blended, and outright fill dirt all circulate under the same name in some markets. Ask what you are buying, check texture and smell on delivery, and get a soil test through a local extension office for pH and nutrients before amending.

How many cubic yards is 1,000 square feet at 2 inches deep?

1,000 times 2 divided by 324 equals about 6.2 cubic yards; order 6.5 to 7 with settling margin. At the commonly cited 1.35 tons per yard, expect roughly 8 to 9 tons to arrive by truck.

How many bags of topsoil equal a cubic yard?

Twenty-seven of the common 1-cubic-foot bags, or 18 of the 1.5-cubic-foot bags, or 13.5 — practically 14 — of the 2-cubic-foot bags. Bags make sense under roughly 1 to 2 yards; past that, bulk usually wins on price and labor.

How much topsoil does a raised bed need?

Multiply bed area by depth and divide by 324. A 4 by 8 foot bed at 12 inches is 32 cubic feet, or 1.19 cubic yards — order about 1.25 to 1.5, since beds settle more than lawns and blending compost loses a little volume.

How do I convert acres to cubic yards of soil?

Multiply acres by 43,560 for square feet, multiply by depth in inches, and divide by 324. Half an acre at 1 inch is 21,780 times 1 over 324, about 67.2 cubic yards — and be honest about how much of the lot is actually being dressed.

Why did my delivered soil pile look smaller than what I ordered?

Loose soil fluffs up when delivered and settles smaller after rain and traffic — the reverse impression is more common. If the pile looks genuinely short, measure it: length times width times average height in feet, divided by 27, is the volume you actually received.

When does a topsoil job need a professional?

When grading directs water toward or away from structures, when volumes top roughly 10 yards and justify machine spreading, when excavation is near utilities — call 811 first regardless — and where drainage engineering matters. Estimating stays yours; earthmoving judgment gets hired.

Is a square yard the same as a cubic yard of soil?

No. A square yard measures area; a cubic yard measures volume — 27 cubic feet. Ordering soil in square yards is the classic unit error; keep measurements in feet, apply depth in inches, and divide by 324 once to get cubic yards.

How do I know what depth of topsoil I need?

Match depth to the project: a quarter to half inch for topdressing established grass, 4 to 6 inches for establishing a new lawn, 6 to 12 inches or more for raised beds, and survey-driven amounts for grade repair. Walk the space with a ruler before computing.

Why is my supplier's per-ton price different from another yard's per-yard price?

Because soil weighs roughly 1.0 to 1.35 tons per cubic yard depending on moisture and composition, the two units describe different economics. Ask each supplier what density they use, convert quotes to a common unit, and compare order totals rather than unit prices.

How much extra topsoil should I order for settling?

Five to 10 percent above the computed volume is the commonly recommended margin, absorbing compaction, low spots, and blending losses. Add it after the calculation is honest — the margin corrects reality's fuzz, not a measurement error.

How many bags of soil do I need for my project?

Twenty-seven 1-cubic-foot bags per cubic yard, 18 of the 1.5s, or 14 of the 2s. Compute cubic yards first — area times inches divided by 324 — then multiply. Past roughly 2 yards, price bulk before committing to the trunk trips.

How can I check that the delivery matches what I ordered?

Measure the pile before spreading: length times width times average height in feet, divided by 27, is the volume delivered. Photograph it, compare against the ticket, and call the same day if the arithmetic disagrees — piles that sit settle into ambiguity.

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