Free mulch calculator for instant cubic yards, bags needed, and cost estimates. Calculate bark mulch, wood chips, or rubber mulch for garden beds, tree rings & playgrounds.
| Depth | Sq Ft / Cu Yard | Sq Ft / 2 Cu Ft Bag | Best Use |
|---|---|---|---|
| 1" | 324 sq ft | 24 sq ft | Light top-up, refreshing |
| 2" | 162 sq ft | 12 sq ft | Weed suppression |
| 3" | 108 sq ft | 8 sq ft | Standard landscaping |
| 4" | 81 sq ft | 6 sq ft | Pathways, moisture retention |
| 6" | 54 sq ft | 4 sq ft | Playgrounds (safety) |
💡 1 cubic yard = 27 cubic feet = approximately 13.5 bags (2 cu ft each)
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Stop guessing and calculate exactly how much mulch you need in seconds! Our free mulch calculator instantly shows cubic yards, bags (2 or 3 cu ft), weight in pounds, and total cost. Works for bark mulch, wood chips, cedar, pine bark, rubber mulch, and dyed mulch. Enter your garden bed dimensions, choose your depth (2-6 inches), and get instant results—no math required. Whether buying bulk mulch by the cubic yard or bagged from Home Depot, Lowe's, or local suppliers, this calculator prevents over-buying and multiple trips.
Mulch is sold in two ways: bulk (by the cubic yard) and bagged (2 cubic feet, 1.5 cubic feet, or 3 cubic feet per bag). One cubic yard equals 27 cubic feet—that's approximately 13.5 standard 2 cu ft bags or 18 bags of 1.5 cu ft. The coverage depends on depth: at 3 inches, one cubic yard covers 108 square feet; at 2 inches, 162 square feet. A 2 cu ft bag covers 8 square feet at 3 inches deep. Bark mulch, wood chips, and dyed mulch all have similar coverage but different weights (400-800 lbs per cubic yard).
Mulch Volume Formula
Volume (cu ft) = Length (ft) × Width (ft) × Depth (in) ÷ 12Avoid over-purchasing mulch that goes to waste or making costly return trips for more material.
Get precise cubic yard and bag counts based on your exact measurements and chosen depth.
See instant cost comparisons between bulk delivery and bagged mulch options.
Know the total weight to determine if you need a truck or professional delivery.
Get realistic cost estimates to plan your landscaping budget before purchasing.
Flower beds and shrub areas benefit from 2-3 inches of organic mulch for weed control and moisture retention. Use hardwood or cedar for best results.
Create mulch rings extending to the drip line—keep mulch 2-3 inches from the trunk. Trees need 3-4 inches of mulch depth for root protection.
Walking paths need 3-4 inches of mulch for cushioning and durability. Rubber mulch or thick bark nuggets work best for high-traffic areas.
Safety requires 6 inches of rubber mulch or 9-12 inches of wood mulch for fall protection. Rubber mulch is preferred as it doesn't compact over time.
Use straw, grass clippings, or undyed wood mulch around vegetables. Apply 2-3 inches between rows to retain moisture and prevent soil splash on leaves.
Pine bark or shredded hardwood mulch stays in place better on slopes. Apply 3-4 inches and consider installing edging to prevent washout during rain.
For 100 square feet: At 2 inches deep = 0.62 cubic yards or 17 bags (2 cu ft). At 3 inches deep = 0.93 cubic yards or 25 bags. At 4 inches deep = 1.24 cubic yards or 34 bags. Quick tip: Most flower beds need 2-3 inches, pathways need 4 inches. Use our calculator for exact amounts.
A 1.5 cubic foot bag of wood mulch weighs 15-20 pounds dry, or up to 30 pounds when wet. This is the compact bag size sold at many stores. For comparison: 2 cu ft bags weigh 20-25 lbs, and 3 cu ft bags weigh 30-40 lbs. Rubber mulch is heavier—about 25-30 lbs per 1.5 cu ft bag.
One cubic yard equals 27 cubic feet, so you need 13.5 bags (round up to 14 bags) of 2 cubic foot mulch. For 1.5 cu ft bags, you need 18 bags per cubic yard. For 3 cu ft bags, you need 9 bags. Bulk is 50-70% cheaper—14 bags at $4-5 each costs $56-70, while bulk costs $30-45 per yard.
A cubic yard of wood mulch weighs 400-800 pounds depending on type and moisture. Dry hardwood mulch: 400-500 lbs. Wet mulch: 600-800 lbs. Pine bark: 350-450 lbs. Rubber mulch: 1,200-1,500 lbs per cubic yard. Always check weight before loading—a pickup truck typically handles 1-2 cubic yards safely.
Apply 2-4 inches of mulch in a ring around trees, extending to the drip line if possible. Critical rule: Keep mulch 2-3 inches away from the trunk to prevent moisture damage and pest problems. Never create 'mulch volcanoes' piled against the trunk—this can kill trees over time.
Add 1-2 inches of fresh mulch annually each spring to maintain proper depth. Complete replacement is typically needed every 2-3 years for wood mulch as it decomposes. Rubber mulch can last 10+ years without replacement. Rake existing mulch to fluff it up before adding new layers.
Shredded hardwood or bark mulch is best for most flower beds—it's affordable, looks natural, and improves soil as it breaks down. For acid-loving plants (azaleas, hydrangeas, blueberries), use pine bark or pine needle mulch. Avoid rubber mulch in flower beds as it doesn't add nutrients to soil.
Wood mulch doesn't attract termites, but it can provide a moist environment they like. To minimize risk: keep mulch 6 inches away from your home's foundation, use cedar or cypress mulch (naturally termite-resistant), and don't pile mulch more than 3 inches deep near structures. Rubber mulch is completely termite-proof.
Usually no—old decomposed mulch improves soil. Only remove old mulch if: it's matted and water can't penetrate, you have fungal problems, or depth exceeds 4 inches. Otherwise, rake to break up matted areas and add fresh mulch on top. The decomposing bottom layer adds organic matter to your soil.