Mulch Calculator — Cubic Yards, Bags & Cost
Calculate how much mulch you need for any garden bed or landscape area. Enter dimensions and desired depth to get cubic yards, bag counts, cost estimate, and bulk vs bag comparison.
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Frequently asked questions
How deep should mulch be?
2–4 inches is ideal for most garden beds. Deeper than 4 inches can prevent water from reaching roots and create conditions for rot. For playgrounds and paths, 3–6 inches of wood chip mulch provides adequate cushioning.
Bulk mulch vs bags — which is better?
Bulk (delivered by the cubic yard) is almost always cheaper for projects requiring more than 3 cubic yards. Bags are convenient for small areas, easy to transport in a car, and reduce waste if you're unsure about quantity.
How often should I replace mulch?
Organic mulch (wood, bark) decomposes and should be refreshed every 1–2 years. Rather than removing old mulch, you can simply top it off with 1–2 inches. Rubber mulch lasts 10+ years. Rock/gravel is essentially permanent.
What is the best mulch for flower beds?
Shredded hardwood bark is the most popular choice for flower beds — it looks attractive, decomposes slowly, and suppresses weeds effectively. Pine bark nuggets are good for acid-loving plants (azaleas, hydrangeas). Compost also works well and adds nutrients.
Does mulch attract termites?
Wood mulch can harbor termites if it's piled against the foundation of your home. Keep mulch 6+ inches away from foundation walls. Inorganic mulches (rubber, gravel) don't attract termites. Cedar mulch has natural insect-repellent properties.