Topsoil Calculator
Bulk topsoil averages $35-$65/yd3 delivered. Standard retail bags are 0.75 cu ft (~40 lbs).
Recommended: 5-10%. Settling and compaction once placed and watered.
Topsoil Calculator: How Much Topsoil Do You Need?
Whether you're leveling a lawn, building a raised garden bed, or filling low spots in your yard, ordering the right amount of topsoil saves you both money and a second delivery trip. Our free topsoil calculator takes your area dimensions and desired depth and instantly tells you how many cubic yards, cubic feet, or bags of topsoil you'll need — plus a full cost estimate including labor, tax, and delivery.
How the Topsoil Calculator Works
Topsoil volume depends on the length and width of the area you're covering, plus how deep you want the layer to be. New lawns typically need 4 to 6 inches of quality topsoil, while raised garden beds often call for 8 to 12 inches. Our calculator converts your square footage and depth into cubic yards and cubic feet, then multiplies by your local price per yard or per bag to give you a full cost estimate — including labor time, sales tax, and delivery fees.
Why This Calculator Has an Adjustable Waste Buffer
This calculator applies the adjustable waste buffer on top of your raw calculated volume. Topsoil settles significantly after it's spread and watered, and real-world grading rarely matches a perfect rectangle — this buffer accounts for settling, uneven terrain, and minor material loss during spreading, so you don't run short partway through the job.
If your site is already well-graded and level, or you'd rather order closer to the exact number, you can adjust the waste buffer percentage directly on this calculator — set it anywhere from 0% to 50% to match your comfort level. Lowering it will reduce both the material estimate and the total cost shown.
Topsoil Depth Guide (By Project Type)
| Project | Recommended Depth | Notes |
|---|---|---|
| Filling low spots | 1–3 inches | Depends on how uneven the area is |
| New lawn / grading | 4–6 inches | Provides a solid base for grass roots |
| Raised garden bed | 8–12 inches | Deeper for vegetables and root crops |
| Topping existing lawn | <1 inch | Thin layer only — thicker will smother grass |
How Much Does a Cubic Yard of Topsoil Cover?
One cubic yard of topsoil covers roughly 324 square feet at 1 inch deep, 162 square feet at 2 inches, and about 108 square feet at 3 inches. Coverage drops as depth increases, which is why deeper projects like raised beds need noticeably more material per square foot than a simple lawn top-dress.
Bagged vs. Bulk Topsoil
Bagged topsoil is convenient for small projects — a few raised beds or small fill-ins — but gets expensive fast per cubic yard. For anything covering more than a few hundred square feet, bulk topsoil delivered by the yard is almost always the more economical choice. Our calculator shows results in both cubic yards and bag counts so you can compare.
Frequently Asked Questions
How much topsoil do I need for a raised garden bed?
Most raised beds need 8 to 12 inches of topsoil for strong root development. A 4x8 ft bed at 10 inches deep needs about 1 cubic yard before any waste buffer is applied.
What is a good waste buffer for topsoil?
5-10% is a practical range for settling and compaction. Well-prepped, level sites can stay near 5%, while rough or sloped terrain often belongs closer to 10%.
How much does a cubic yard of topsoil weigh?
Dry topsoil typically weighs between 2,000 and 2,700 pounds per cubic yard. Wet soil can weigh considerably more depending on moisture content.
What's the difference between topsoil and garden soil?
Topsoil is the natural upper layer of soil used for grading and general landscaping. Garden soil is usually topsoil blended with compost and other organic matter for planting flowers, vegetables, and shrubs.
Can I put topsoil over existing grass?
A thin layer can work for minor lawn leveling, but several inches over existing grass will usually smother it. For new lawns, it's best to remove existing grass and weeds before spreading fresh topsoil and seed.
Should I mix compost into topsoil?
Yes, if you're preparing a planting area. Compost improves soil structure, drainage, and nutrient content, and is commonly mixed in when prepping garden beds for healthier plant growth.
Related Calculators
Planning a full landscaping project? These calculators pair well with topsoil:
Mulch Calculator — estimate mulch to top off beds after adding fresh topsoil.
Grass Seed Calculator — figure out seed needs for a lawn planted over new topsoil.
Turf / Sod Calculator — plan sod coverage for areas leveled with fresh topsoil.