Topsoil Calculator
Estimate cubic yards, tons and bags of topsoil for lawns, gardens and landscaping projects.
Project Dimensions
Soil Material
How to Calculate Topsoil
Topsoil quantity is based on the area you need to cover, the soil depth and the density of the material. CornerSpan converts your measurements into practical ordering quantities.
1. Find Area
Length × Width gives the project area.
2. Find Volume
Area × Depth gives the soil volume.
3. Plan Your Order
Add waste and convert the result into yards, tons or bags.
Topsoil Calculator Example
For a 20 × 10 ft area with a 4-inch soil depth, the base volume is about 2.47 cubic yards. With a 10% allowance, the order quantity is about 2.72 cubic yards. Using a density of 1.05 tons per cubic yard gives an estimated weight of about 2.86 tons.
Common Topsoil Uses
Topsoil Calculation Formulas
Area
Area = Length × Width
Volume
Volume = Area × Depth
Estimated Weight
Tons = Cubic Yards × Soil Density
Frequently Asked Questions
How much topsoil do I need?
Measure the length and width of the area, multiply them to find the surface area, then multiply by the required soil depth. Convert the resulting volume to cubic yards and add a waste allowance when appropriate.
How many cubic yards of topsoil are in a ton?
It depends on soil density and moisture. A common estimating value for topsoil is around 1.05 tons per cubic yard, but the supplier's stated density should be used for purchasing calculations.
How deep should topsoil be for a lawn?
Required topsoil depth depends on the existing soil, grading, drainage and the type of lawn being installed. Use the depth recommended for your specific project rather than assuming one universal depth.
How do I calculate topsoil for a raised bed?
Multiply the raised bed's length by its width and average soil depth. The calculator converts that volume into cubic yards, cubic feet, cubic meters, tons and bags.
Does the calculator include waste?
Yes. You can select a waste allowance from 0% to 20%. The allowance increases the recommended order quantity to account for settling, uneven areas and small measurement differences.
Should I buy topsoil in bags or bulk?
Bulk topsoil is commonly used for larger landscaping areas, while bags can be more convenient for smaller projects or locations with limited access. Compare the actual volume and delivered quantity before purchasing.
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Important Note About Soil Density
Topsoil weight varies with moisture, organic content, compaction and material composition. The ton estimate is therefore an estimate. For an actual order, use the density provided by your local supplier.