Calculate exactly how much mulch you need for your garden beds. Enter dimensions and desired depth to get cubic yards, cubic feet, or number of bags. Free online tool.
Recommended: 2–4 inches (5–10 cm) for new beds, 1–2 inches (2.5–5 cm) for top-ups
This free online mulch calculator helps you estimate exactly how much mulch you need for your garden or landscaping project. Simply enter the dimensions of each garden bed, choose your desired mulch depth, and optionally select a bag size. The calculator instantly computes the total volume in cubic feet, cubic yards, or liters, and tells you how many bags to buy. No signup required — 100% client-side.
For new beds, apply 2–4 inches (5–10 cm) of mulch. For topping up existing mulch, 1–2 inches (2.5–5 cm) is usually enough. Too shallow and weeds will grow through; too deep and water may not reach plant roots.
It depends on your bed area, desired depth, and bag size. Most standard bags are 2 cubic feet. Enter your dimensions above and select your bag size to get an exact count. Always round up and buy a few extra.
A cubic yard is a volume measurement equal to 27 cubic feet. One cubic yard of mulch typically covers about 100 square feet at a depth of 3 inches. Bulk mulch is often sold by the cubic yard.
Yes! The volume calculation works for any material. Simply enter your bed dimensions and desired depth. Note that bag sizes may differ for gravel, soil, or compost.