You measured the yard, stared at the numbers, and still have no clue how many bags to order.
We hear that question more than almost any other around here. Order too little and you will be making a second trip across town. Order too much and a sad pile of dirt may sit on your driveway, hardening for a month.
Working out how much topsoil you need really comes down to one friendly bit of grade-school math. Grab a tape measure and a coffee.
We will do the numbers together, and it is far easier than it looks.
The Only Math You Really Need
The whole thing is three measurements multiplied together.
You take the length, the width, and the depth of the space you want to fill. Measure the length and the width in feet. Pick your depth in inches, since nobody digs a flower bed a full foot deep by accident. That is the entire setup. Once you have those three numbers, a quick conversion turns them into the unit soil is actually sold in, which is cubic yards.
The recipe goes like this:
- Multiply length by width to get your square footage.
- Divide your depth in inches by 12 to turn it into feet.
- Multiply the square footage by that depth in feet for cubic feet.
- Divide the cubic feet by 27 to get your cubic yards.
Say your new bed measures 10 feet by 4 feet, and you want it 6 inches deep. Ten times four is 40 square feet. Six inches is half a foot, so 40 times 0.5 gives you 20 cubic feet. Divide that by 27 and you land at roughly three-quarters of a cubic yard. Round up, and you need one cubic yard.
That happens to be exactly one Super Sack, which we will come back to in a minute.
Why We Divide by 27 Every Time
One cubic yard holds 27 cubic feet, so that number never changes. It is the little bridge between the feet you measured and the cubic yards of topsoil you order. Every Super Sack we fill holds one full cubic yard, which is that same 27 cubic feet. So the cubic yard total from your math is also your sack count, plain and simple.
How to Handle a Weird-Shaped Yard
Curvy beds and awkward corners scare people off, and they really should not. Break the space into simple rectangles in your head, measure each one, and add the pieces together at the end. For a circle, multiply 3.14 by the radius times the radius. A few small sums will always beat one impossible guess.
A Quick Note on What Topsoil Is
In a natural soil profile, topsoil commonly refers to the surface A horizon, which is generally darker and more biologically active than the layers below it. In landscaping, screened topsoil is soil processed to remove oversized rocks, sticks, roots, and other debris. It differs from fill dirt, which is generally used for grading and filling rather than planting.
When your goal is a green lawn or a thriving bed, you want true topsoil under your plants.
How Deep Should Your Topsoil Go
Depth is where most people slip up, and it matters even more than length and width. Too shallow and your grass or plants may not establish as well as they should. Too deep and you may be paying for soil the project does not need. The right depth depends on the project and existing soil conditions, so treat these as practical starting points:
- New lawn from seed or sod: 4 to 6 inches of good topsoil.
- Flower and garden beds: 6 to 8 inches so roots have room to stretch.
- Raised beds: 8 to 12 inches, going deeper for carrots and potatoes.
- Levelling low spots or overseeding: a thin 1 to 2 inches.
- Top dressing an existing lawn: a light quarter to half inch.
For levelling dips or filling sunken spots across a lawn, our Nature’s Blend is the one to reach for. The touch of mineral soil mixed into the peat loam and compost gives it a bit more body, so it holds its shape as you smooth things out.
How to Calculate Topsoil for a Garden Bed
To calculate topsoil for a garden bed, treat 6 to 8 inches as your target depth. Measure the bed, run it through the same length by width by depth math, then divide by 27. Deeper-rooted vegetables enjoy the full 8 inches, while flowers settle in happily closer to 6.
If you are building raised beds, lean toward the deeper end so roots have room to develop.
A Light Hand for Top Dressing
Top dressing is the gentlest job on the whole list. You are spreading a light layer over an existing lawn, never burying it; for compost top dressing, the University of Minnesota Extension recommends about a quarter inch of compost. Our Premium TopDressing Mix is built for this kind of light application, blending into the surface to improve the soil gradually.
A thin layer goes a surprisingly long way here, so resist the urge to pour it on thick.
The Cheat Sheet for Topsoil Coverage per Yard
Sometimes you just want the quick answer without touching a calculator. This little chart shows how far a single cubic yard stretches, depending on how deep you spread it. Keep in mind that one yard is one Super Sack, so you can read it as sacks too:
- 1 inch deep covers about 324 square feet.
- 2 inches deep covers about 162 square feet.
- 3 inches deep covers about 108 square feet, roughly a 10 by 10 patch.
- 4 inches deep covers about 81 square feet.
- 6 inches deep covers about 54 square feet.
How Far Does a Yard of Topsoil Cover?
A single cubic yard covers about 324 square feet at 1 inch deep. Spread it deeper and that number drops quickly because the same volume covers less surface area. This is the whole idea behind topsoil coverage per yard, and it is why depth changes your order so dramatically. Halve the depth and you double the area you can cover.
When to Round Your Order Up
Consider nudging your final number up a little. Soil can settle after it is laid, wheelbarrows spill, and uneven grades can use more material than the basic math suggests. Adding around 10 percent is a practical allowance for those variables.
Running a touch over beats coming up short on a Sunday afternoon with the stores closed.
How Much Topsoil Do You Need for Common Yard Projects?
Let us run a few real projects through the math, since that is usually the picture in someone’s head when they ask how much topsoil do I need. These are the jobs we quote at the counter all the time:
- A 10 by 10 garden bed at 6 inches: 50 cubic feet, just under 2 yards, so two Super Sacks.
- A 500-square-foot lawn repair at 4 inches: about 167 cubic feet, or 6.2 cubic yards, so seven Super Sacks when ordering whole-yard sacks.
- Two 4-by-8 raised beds at 12 inches: 64 cubic feet, about 2.4 cubic yards, so three Super Sacks.
- A small 8-by-10 overseeding area at 1 inch: under 7 cubic feet, so one Super Sack with plenty to spare.
Notice how the bigger jobs climb into several yards while a light overseed barely fills part of one sack. That gap is all about depth, which is exactly why measuring beats guessing. Once you have your own number, you are ready to order with confidence.
The Cleanest Way to Get Your Topsoil
Once you know your number, getting the soil home is the easy and honestly satisfying part.
We pack everything into Super Sacks, each one holding one cubic yard. The bag arrives on your driveway with a duffel top that helps keep rain out and a spout on the bottom for a slow, controlled pour. That means fewer torn plastic bags, no shovelling out of a truck bed, and less mess to sweep up afterward. Ordering takes five simple steps.
You pick your product, choose your quantity, drop in your postal code, schedule the day that suits you, and we deliver it to your door.
Why Screened Topsoil Is Worth It
Every yard of our screened topsoil is processed before it reaches you. Oversized rocks, sticks, roots, and other debris are sifted out, leaving a smoother, more consistent material that is easier to work with. We screen our own soil in our yard rather than buying it pre-bagged, which is how we keep the quality where we want it.
Screened soil spreads and grades more smoothly because oversized debris has been removed. Its drainage and fertility still depend on the soil’s texture and composition, but the consistent material makes the job easier to manage.
Sack, Bin, or a Visit to the Yard
You have three easy ways to take it home. Order Super Sacks online and we deliver them straight to your door. Rent a disposable bin when a big cleanup is part of the project. Or swing by our Innisfil yard, say hello, and load up in person. Every route ends the same way, with good soil and a friendly face.
Let the Calculator Do the Heavy Lifting
Doing the math by hand is a fun little party trick, and we made it even simpler than that.
Pop your length, width, and depth into our topsoil calculator, and it calculates how much topsoil you need in a couple of taps, giving you the result in cubic yards.
From there, ordering your Super Sacks takes about a minute.
Tell us your project, and we will make sure the right amount of good, screened soil lands at your door.
From our yard to yours!