How to Use the Topsoil Calculator
- Measure the length and width of the area.
- Enter the depth or thickness you need and choose a unit for each measurement.
- Add waste or extra material when the job calls for it, then review the volume estimate.
Topsoil Calculation Formula
Convert all dimensions to feet, multiply length by width by depth, then divide cubic feet by 27 to get cubic yards. One cubic foot equals approximately 0.0283 cubic meters.
Worked Example
A 10 ft by 10 ft area covered to 4 inches has a base volume of 33.33 cubic feet, or about 1.23 cubic yards, before any waste allowance.
How Much Topsoil Do I Need?
Order topsoil by the calculated cubic-yard volume, then confirm whether the supplier sells screened, blended, or compost-enriched soil. Soil can settle after placement, so the finished depth and site preparation matter.
Unit Conversions
Frequently Asked Questions
What does the topsoil calculator measure?
Estimate how much topsoil you need for beds, lawns, and planting areas.
Which units can I use?
Enter each dimension in inches, feet, yards, centimeters, or meters. The results are shown in cubic feet, cubic yards, and cubic meters.
Should I add extra material?
Add a waste allowance when cutting, settling, spillage, or uneven ground may affect the amount you need. The calculator shows the allowance used.
How much topsoil do I need?
Order topsoil by the calculated cubic-yard volume, then confirm whether the supplier sells screened, blended, or compost-enriched soil. Soil can settle after placement, so the finished depth and site preparation matter.
How deep should topsoil be for a new lawn?
A new lawn commonly needs 4 to 6 inches of good topsoil. Enter the depth your site requires in the topsoil calculator, accounting for existing soil quality and final grade.
Does the topsoil estimate account for settling?
No. The calculated volume is based on the dimensions entered. If the soil will settle or be compacted, confirm the expected settlement with your supplier and order an appropriate extra amount.