Free Mulch & Landscaping Calculator – Cubic Yards & Bags

Free mulch and landscaping calculator. Estimate cubic yards, bags, weight, and cost for mulch, topsoil, gravel, sand, or compost for any outdoor project.

Mulch Calculator Guide

The Mulch Calculator determines how many cubic feet, cubic yards, and bags of mulch you need for your garden beds. Enter the area dimensions and desired depth to instantly see the volume required and estimated cost.

Depth is the most important variable. For weed suppression, 3–4 inches is ideal. For moisture retention around trees, 2–3 inches is sufficient. Keep mulch 2–3 inches away from plant stems and tree trunks to prevent rot and pest problems.

Organic mulches (wood chips, bark) settle 20–30% in the first season, so apply slightly thicker than your target depth. Refresh mulch annually in spring by adding 1–2 inches on top of the existing layer. Always buy 10–15% more than calculated to account for settling.