Fill Dirt Calculator

Calculating the amount of fill dirt you need begins by measuring the length and width of the area in feet, then determining the desired depth. Most grading and site preparation projects require fill dirt to be installed in multiple compacted layers, so it's important to estimate the total finished depth before ordering. If your depth is measured in inches, convert it to feet before calculating the volume.

The basic formula is:

Length × Width × Depth ÷ 27 = Cubic Yards

One cubic yard contains 27 cubic feet, making it the standard unit used to purchase bulk fill dirt and other landscape materials.

Our Fill Dirt Calculator performs these calculations automatically, helping you estimate the amount of material needed without doing the math yourself.

The amount of area one cubic yard of fill dirt covers depends on how deep the material is installed.

These examples are intended as general guidelines. Actual requirements may vary depending on grading, compaction, settling, and site conditions.

Fill dirt is primarily used to create a stable foundation for construction and landscaping projects. Because it contains little to no organic material, it compacts well and provides long-term support without the settling that can occur with nutrient-rich topsoil.

Common applications for fill dirt include:

For projects that require healthy soil for planting, topsoil is generally the better choice. Fill dirt is designed for structural support and site preparation rather than growing grass, flowers, or gardens.

Before ordering fill dirt, keep these best practices in mind:

Measure the finished grade. Calculate the total amount of fill needed based on your desired final elevation, not just the existing ground level.
Plan for compaction. Fill dirt is typically installed and compacted in layers to create a stable foundation. Depending on your project, additional material may be needed to achieve the desired finished grade after compaction.

Remove organic material first. Clear away grass, roots, topsoil, and other organic matter before placing fill dirt to help ensure long-term stability.
Maintain proper drainage. Grade the surface so water flows away from foundations and structures to help prevent pooling and erosion.
Order a little extra. Consider ordering slightly more fill dirt than calculated to account for uneven terrain, compaction, and minor measurement differences.

Proper site preparation and accurate measurements can help reduce waste, avoid additional deliveries, and create a more stable finished project.