Topsoil Calculator — Free & Easy

How to use the Topsoil Calculator

Estimate bulk topsoil in cubic yards, cubic meters, cubic feet and approximate metric tonnes using area length, width, depth, extra allowance and adjustable soil density.

1. Step 1. Measure the rectangular area that needs topsoil.
2. Step 2. Select feet or meters for the area and inches, centimeters or feet for depth.
3. Step 3. Set a realistic extra percentage to account for settling or uneven surfaces.
4. Step 4. Use your supplier’s density or volume units before converting the estimate into an order.

Important: Volume estimates must be confirmed with supplier grade, moisture and delivery practices.

Topsoil Calculator formula explained

Volume in m³ = length × width × depth (all converted into meters) × (1 + extra%). Cubic yards = m³ ÷ 0.9144³. Mass in kg = volume in m³ × density in kg/m³.

All calculator outputs depend on the measurements, units and assumptions you enter. Intermediate calculations use unrounded numeric values; formatted results may be rounded for easier reading. For any consequential purchasing or construction decision, verify supplier specifications and regulations.

Worked example with real numbers

For a 20 × 10 ft area covered 4 in deep, the base volume is about 2.47 yd³. With 10% extra, the estimate increases to about 2.72 yd³.

The example illustrates the formula independently of the interactive fields. You can change the values above to match your own project and compare results.

Frequently asked questions