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Playground Mulch Calculator

Calculate engineered wood fiber (EWF) playground mulch for backyard play sets and swing areas. ASTM-certified fall protection — exact cubic yards, bags, and cost at safety-rated depth.

You'll need
4.44 cu yd · 60 bags
Cost
$158–$270
Project details
Areas
Area 1
LengthWidthside viewDepth
Area: 160 sq ftVolume: 120 cu ft
Total160 sq ft · 120.00 cu ft
Material
Playground Mulch (engineered) · Engineered fall protection — 9 inches minimum for safety code.
Default depth: 9"Density: ~22 lbs/cu ft
How you'll buy it
💡 Bulk delivery recommended
Your project is ≥1 cubic yard — bulk is usually half the cost of 60 bags.

Leave blank to use estimate

Default: $35–$60/yd

Typical: $50–$120

Extras

Plastic, metal, or stone edging

Cost breakdown

Showing bulk delivery pricing (recommended for your volume).
Playground Mulch (engineered) · 4.50 cu yd$158 – $270
Total project cost$158 – $270
💡 Comparison: 60 bags would cost $300 – $600; bulk (4.50 yd) would cost $158 – $270.

Shopping list

Everything you need for this project.
  • Playground Mulch (engineered) (bulk delivery)4.50 cu yd
  • Wheelbarrow1
  • Garden rake & flat shovel1 set
  • Gloves1 pair
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Math breakdown

Step-by-step from your inputs.
Area 1 · 20 × 8 × 9"/12120 cu ft
Total volume120.00 cu ft
Cubic yards · ÷ 274.44 cu yd
Bags · ÷ 2 cu ft per bag60 bags
Weight · @ 22 lbs/cu ft2,640 lbs (1.32 tons)

Pro tips

9 inches minimum for safety. Engineered playground mulch needs 9 inches depth to meet ASTM F1292 fall-protection standards (up to 8-foot fall heights). 12 inches for taller equipment.

EWF vs. wood chips: not the same. Engineered wood fiber is processed specifically for playgrounds — uniform size, no twigs or wires. Generic wood chips don't meet safety standards. Don't substitute.

Top off annually. Foot traffic and weather compact playground mulch by 30-50% per year. Add 2-3 inches fresh every spring to maintain the safety depth.

Frequently asked questions

Why 9 inches deep for playground mulch?▾
ASTM F1292 testing shows 9 inches of engineered wood fiber absorbs impact from 8-foot falls (the max for backyard play sets). Less depth = less protection. Commercial playgrounds with taller equipment use 12 inches.
How much playground mulch for a 20×20 area?▾
20 × 20 = 400 sq ft. At 9 inches: 400 × (9/12) ÷ 27 = 11 cubic yards. That's about 5,500 lbs. Bulk delivery is much easier than 270 bags.
Engineered wood fiber vs. rubber playground mulch?▾
EWF is cheaper ($35-$60/yard) but compacts and needs annual top-up. Rubber is 4-5× more expensive but lasts 10+ years with minimal maintenance. EWF for budget, rubber for low-maintenance.
Can I just use regular wood chips?▾
Not for safety-rated installations. Regular chips have variable size, sharp edges, occasional twigs/debris, and don't compact predictably for fall absorption. Use EWF specifically.

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Disclaimer. This calculator provides estimates for planning purposes. Actual material quantities and costs may vary based on site conditions, material availability, and local pricing.