Estimate the volume and weight of gravel, mulch, sand or topsoil for an area.
Calculated instantly in your browser.
How do you calculate how much gravel or mulch you need?
Volume = length × width × depth, and Weight = volume × the material's density (gravel ≈ 1.6 t/m³, mulch ≈ 0.45 t/m³). For example, a 20 ft × 10 ft area at 3 inches deep needs about 1.85 cubic yards of gravel. Order around 10% extra for settling and uneven ground; densities are approximate and vary by supplier and moisture.
Understanding your result
Order around 10% extra for settling and uneven ground. Densities are approximate and vary by supplier and moisture.
Formula and method
Volume = length × width × depth. Weight = volume × the material’s density (gravel ≈ 1.6 t/m³, mulch ≈ 0.45 t/m³).
Worked example
A 20 ft × 10 ft area at 3 inches deep needs about 1.85 cubic yards of gravel.
How to use this tool
- Enter the length, width and depth of the area.
- Choose the material.
- Press Calculate.
About the Gravel & Mulch Calculator
The Gravel & Mulch Calculator estimates how much landscaping material you need by volume and weight, for gravel, sand, topsoil, mulch or crushed stone.
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Frequently asked questions
How deep should gravel be?
About 2 inches for decorative cover and 4 or more inches for driveways and high-traffic areas.