🌱 Mulch Calculator

Calculate cubic yards or bags of mulch needed for garden beds and landscaping. Enter your area dimensions and desired depth for instant, accurate results.

🌱
Project Details
Enter your area dimensions and preferences
ft
ft

3 inches is the recommended depth for optimal weed suppression and moisture retention

📊
Calculation Results
🌱

Enter your dimensions above and click Calculate to see results.

Quick Reference: Mulch Coverage Chart

Use this table to quickly estimate cubic yards needed based on area and depth. One cubic yard covers 324 sq ft at 1" depth, 162 sq ft at 2" depth, and 108 sq ft at 3" depth.

Area (sq ft) 2" Depth (cu yds) 3" Depth (cu yds) 4" Depth (cu yds) 2 cu ft Bags (3")
100 sq ft0.620.931.2313 bags
200 sq ft1.231.852.4728 bags
500 sq ft3.094.636.1770 bags
1,000 sq ft6.179.2612.35139 bags
2,000 sq ft12.3518.5224.69278 bags

1 cubic yard = 27 cubic feet. Bulk mulch is sold by the cubic yard; bagged mulch is typically 1, 2, or 3 cu ft per bag.

US Mulch Types & Uses

Hardwood Shredded Mulch – The most popular choice in the US. Breaks down to enrich soil over 1–2 years. Great for flower beds, around trees, and walkways. Typical cost: $30–$50/cubic yard bulk.

Pine Bark Nuggets – Slow to decompose, resists compaction. Excellent for slopes and acid-loving plants like azaleas and rhododendrons. Floats more than shredded types — avoid in flood-prone areas.

Cedar Chips – Natural insect repellent properties. Slower to decompose than hardwood. Aromatic and long-lasting. Popular in the Mountain West and Pacific Northwest.

Rubber Mulch – Made from recycled tires. Does not decompose, biodegrade, or attract insects. Common for playgrounds, around trees, and high-traffic areas. More expensive upfront but lasts 10+ years.

Straw / Hay – Best for vegetable gardens and overseeded lawns. Breaks down quickly. Not recommended for ornamental beds.

Frequently Asked Questions

The standard recommendation in the US is 2–4 inches of mulch for most garden beds. A 3-inch layer is ideal — it suppresses weeds, retains soil moisture, and moderates soil temperature. Avoid "volcano mulching" (piling mulch up against tree trunks), which can cause rot and disease. Keep mulch 2–3 inches away from plant stems and tree trunks.
Cubic yards = (Area in sq ft × Depth in inches) ÷ 324. For example, a 200 sq ft garden bed at 3" depth = (200 × 3) ÷ 324 = 1.85 cubic yards. Our calculator applies this formula automatically and adds a 10% waste factor for uneven ground and edges.
Bulk mulch is almost always cheaper for large projects. In the US, bulk hardwood mulch typically costs $25–$60 per cubic yard delivered. Bagged 2 cu ft bags cost $4–$7 each at Home Depot or Lowe's, which works out to $54–$95 per cubic yard — 2× to 3× more expensive. If you need 3+ cubic yards, ordering bulk from a local landscape supply yard will save significant money.
Most organic mulch (wood chips, bark) needs replenishing every 1–2 years as it decomposes into the soil. Before adding new mulch each spring, rake back the existing layer to check depth. If it's still 2"+ thick, you may only need a light topdress. In hot Southern climates, mulch may break down faster; in cooler Northern states it may last longer.
A "yard" of mulch refers to one cubic yard (3 ft × 3 ft × 3 ft = 27 cubic feet). Weight varies by mulch type and moisture content. Dry hardwood mulch weighs roughly 400–800 lbs per cubic yard. Pine bark is lighter at 200–400 lbs/yd³. Wet mulch can be significantly heavier. A standard pickup truck bed holds about 1–2 cubic yards depending on the size and whether the mulch is wet or dry.
Yes, rubber mulch can get significantly hotter than organic mulch in direct sunlight, which may stress heat-sensitive plants. It is not recommended for vegetable gardens. However, it is excellent for playgrounds, high-traffic landscape areas, and around trees where it doesn't need to be removed. Rubber mulch does not attract termites or other insects and lasts 10–15 years, making it cost-effective long-term.