Playground Mulch Calculator
5.56 yd³ (150 ft³)
75 × 2 ft³ bags (whole-bag round-up).
≈ 1.67-2.78 tons (Wood mulch (shredded) density band, confirm at the scale).
- Volume: yd³ = sq ft × depth(in) ÷ 324 (1 yd³ covers 324 sf at 1"). Definitional geometry (Texas AgriLife Extension).
- Bags: whole-bag round-up at 2 ft³/bag (27 one-ft³ or 13.5 two-ft³ bags per yd³).
- Tonnage is a band: Wood mulch (shredded) ≈ 0.3-0.5 t/yd³ (extension-service band: mulch is sold by volume, weight shown for hauling only). Moisture alone moves this ±15%, so confirm with your supplier's scale.
Why This One Is Different
Playground surfacing isn't a landscaping choice, it's a fall-protection system, and the required depth is set by how far a child can fall, not by how the bed looks. Federal playground-safety guidance recommends 9 inches of loose-fill wood mulch under equipment with an 8-foot fall height, and that number has to hold up after months of raking, rain compaction, and kids kicking material toward the edges. This calculator sizes the fall zone at that 9-inch default and converts the volume into a whole-bag count, with the facts below explaining why loose-fill surfacing needs periodic topping off rather than a one-time fill.
Where the Numbers Come From
- How deep the mulch needs to be isn't a design choice, it's set by the safety standard: 9 inches of loose-fill wood mulch is the recommended depth for fall protection under play equipment with an 8-foot fall height. Source: CPSC, Public Playground Safety Handbook
- Loose-fill surfacing compresses under use and scatters toward the edges, so it needs to be maintained at its full tested depth through regular raking and periodic replenishment, not installed once and left alone. Source: CPSC, Public Playground Safety Handbook (maintenance guidance)
- Playground-grade engineered wood fiber is tested to fall-height standards differently than ordinary landscape mulch. A bag labeled for garden beds isn't automatically rated for use under play equipment. Source: CPSC, Public Playground Safety Handbook
- That depth eats up material fast: volume still runs on the standard area × depth ÷ 324 rule, and at 9 inches, one cubic yard covers just 36 sq ft, far less than the 324 sq ft it covers at 1 inch. Source: Texas AgriLife Extension, 'How Much Compost, Soil or Mulch Do I Need to Purchase?'
More Questions
Can I use regular garden mulch under playground equipment?
Ordinary landscape mulch isn't tested to the same fall-protection standard as playground-grade engineered wood fiber. Confirm your product is rated for playground use before installing it under equipment.
Related Calculators
Formulas, waste factors, and cost models on this page follow the sourced conventions on our methodology page. Estimates only; verify with your supplier and local code.