Topsoil Calculator: How Much Topsoil Do You Need?
Our topsoil calculator helps you estimate how much soil you need in cubic yards, cubic feet, or cubic meters for lawns, garden beds, raised beds, and landscaping projects. Whether you're spreading fresh soil for grass or building a new planting bed, getting the right volume prevents over-ordering or costly shortages.
Most suppliers sell bulk topsoil by the cubic yard, while bagged soil is typically sold in cubic feet. This calculator converts everything automatically so you can order with confidence.
How to Calculate Topsoil Volume
To determine how much topsoil you need, use this simple formula:
Volume = Area × Depth
- Measure the length and width of your area (or use one of the shape calculators above).
- Decide how deep the topsoil layer should be.
- Multiply the area by the depth.
The result gives you total volume. For ordering, that volume is usually converted into cubic yards of topsoil.
If you already know your square footage, you can enter it directly into the manual area calculator and choose your depth.
Cubic Yards vs Cubic Feet
Many homeowners ask: How many cubic feet are in a cubic yard?
1 cubic yard = 27 cubic feet
If you’re buying bagged soil, a standard bag is often 0.75, 1, 1.5, or 2 cubic feet. Divide your total cubic feet by the bag size to estimate how many bags you need.
If you're ordering in bulk, most landscape suppliers deliver soil by the cubic yard. It’s smart to round up slightly to account for settling and minor grading adjustments.
How Much Topsoil Do I Need?
Here’s a general coverage guide for 1 cubic yard of topsoil:
- About 100 sq ft at 3 inches deep
- About 75 sq ft at 4 inches deep
- About 50 sq ft at 6 inches deep
Your exact coverage depends on depth and compaction.
Recommended Topsoil Depth
Lawn Leveling
Use 2–3 inches for minor leveling or overseeding.
New Lawn Installation
4–6 inches is recommended for proper root development.
Garden Beds
4–6 inches works well for most garden beds, and 6+ inches supports deeper root systems.
Raised Beds
Raised beds are commonly 6–12 inches deep depending on what you’re planting.
Bulk Topsoil vs Bagged Soil
Bulk Topsoil
- Sold by the cubic yard
- More cost-effective for large areas
- Requires delivery access
Bagged Topsoil
- Easier for small projects
- Available at home improvement stores
- More expensive per cubic foot
For larger landscaping projects, using a bulk estimate helps you plan deliveries and reduce waste.
Topsoil Cost Estimate
Topsoil pricing varies based on screened vs unscreened soil, organic content, delivery distance, and regional pricing.
If you’re ordering in bulk, entering a price per cubic yard gives you a quick project estimate. For small projects, estimating bag cost can help you compare bagged vs bulk options.
Weight of Topsoil
Topsoil weight depends on moisture content and composition. Wet soil is significantly heavier than dry soil.
On average, 1 cubic yard of topsoil weighs between 2,000 and 2,700 pounds.
How to Measure for Topsoil
- Measure your area (rectangle, circle, triangle, etc.) from the above calculators.
- Decide how deep the soil layer should be.
- Use the appropriate shape calculator above.
- Round up your final cubic yard estimate for settling and minor grading.
If your space has multiple shapes, calculate each section and add them together—or use the manual area input option above.
After spreading topsoil, many homeowners apply a protective layer of mulch to retain moisture, suppress weeds, and protect the soil surface.
For vegetable plots and planter boxes, compare your estimate with the raised bed soil calculator to size soil volume for deeper growing layers.
FAQs
How do I convert square feet to cubic yards for topsoil?
Multiply square feet by depth (in feet) to get cubic feet, then divide by 27 to convert cubic feet to cubic yards.
Should I compact topsoil after spreading?
Light leveling is fine, but avoid heavy compaction in planting areas so roots can breathe and water can drain properly.
Can I use topsoil for raised beds?
Yes, but many gardeners mix topsoil with compost to improve nutrients and structure for better plant growth.
How much extra topsoil should I order?
Ordering about 5–10% extra is a good buffer for settling, uneven ground, and minor grading adjustments.