Rubber Mulch Calculator
Enter your bed or fall-zone area and the mulch depth to get the cubic yards, weight, and bag count of rubber mulch you’ll need.
Measure straight across the widest point.
Adjust depth below if needed.
Covers spillage and compaction. 5–10% is normal.
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Bags or bulk delivery?
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Coverage & weight
Material profile
For the default 20 ft × 10 ft area at 3 inches deep, you’ll need about 2.04 cubic yards (0.76 tons) of landscape rubber mulch, including 10% waste. Round up to 1 ton for bulk ordering — around $319.44 delivered, versus $1,054.50 in 0.5 cu ft bags.
Rubber mulch needed for common project sizes
These estimates use landscape-grade rubber mulch at 750 lb per cubic yard with a 10% waste allowance built in.
| Project | Depth | Cubic yards | Tons |
|---|---|---|---|
| Small garden bed, 100 sq ft | 3 in | 1.02 yd³ | 0.38 tons |
| Medium garden bed, 400 sq ft | 3 in | 4.07 yd³ | 1.53 tons |
| Home playset fall zone, 200 sq ft | 6 in | 4.07 yd³ | 1.53 tons |
| Playground fall zone, 600 sq ft | 6 in | 12.22 yd³ | 4.58 tons |
| Walking path, 150 sq ft | 2 in | 1.02 yd³ | 0.38 tons |
| Large bed border, 1,000 sq ft | 3 in | 10.19 yd³ | 3.82 tons |
Rubber mulch types, weight and best use
| Type | Weight per yd³ | Best for | Drainage |
|---|---|---|---|
| Playground-grade rubber mulch | 750 lb | Playgrounds, fall-zone safety surfacing | Excellent |
| Landscape rubber mulch | 750 lb | Garden beds, low-maintenance borders | Excellent |
Figures are for dry material. Wet or freshly delivered material can weigh noticeably more.
How to calculate rubber mulch you need
- Measure the coverage area length × width in feet for a bed or fall zone, or use the circle/border option for playsets.
- Set the depth 2in for a decorative path, 3in for garden beds, 6in for playground fall-zone safety surfacing under a set height.
- Pick a mulch type playground-grade for certified fall-height protection under play equipment, landscape grade for garden beds and borders.
- Add waste 10% covers spillage and uneven spreading, especially around edging and equipment posts.
- Compare bulk vs. bagged cost bulk delivery is cheaper for anything beyond a small bed — rubber mulch bags cost noticeably more per ton than bulk aggregate.
Worked example
Using the calculator’s default 20 ft × 10 ft area at 3 inches deep with landscape rubber mulch:
- Area20 ft × 10 ft = 200 sq ft
- Depth in feet3 in ÷ 12 = 0.25 ft
- Volume200 sq ft × 0.25 ft = 50.0 cu ft
- Plus 10% waste50.0 × 1.10 = 55.0 cu ft
- Cubic yards55.0 ÷ 27 = 2.04 yd³
- Weight (landscape rubber mulch, 750 lb/yd³)2.04 × 750 = 1,527.8 lb = 0.764 tons
- Order amountRound up to 1.0 ton — order in quarter-ton increments
- Bulk vs. bagged costBulk: 0.764 tons × $320/ton + $75 delivery = $319.44. Bags: 111 × $9.50 = $1,054.50
Recommended depth by project
| Project | Recommended depth | Notes |
|---|---|---|
| Walking path / border | 2 in | Decorative depth for paths and narrow borders |
| Garden bed | 3 in | Standard weed suppression and moisture retention depth |
| Home playset fall zone | 6 in | Typical residential depth under swings and slides |
| Certified playground fall zone | 6-9 in | Depth depends on the equipment's fall height rating — check ASTM/CPSC guidance |
| Under-deck or drainage area | 2-3 in | Non-play use where drainage matters more than fall protection |
Bags or bulk delivery?
Bagged rubber mulch (0.5 cu ft) costs noticeably more per ton than bulk delivery, since rubber mulch bags are already a premium product. Bulk delivery pays off quickly for anything beyond a small accent bed, and it’s the standard way playgrounds and larger landscape jobs are supplied.
- Small accent bedsunder about 0.5 ton (roughly 55 bags) — bags are fine for a small border or planter ring.
- Medium beds/home play areas0.5 to 2 tons — compare bulk-plus-delivery pricing against the bag total, since rubber mulch bags add up fast.
- Playgrounds and large jobsover 2 tons — bulk delivery is significantly cheaper and is how certified playground fall-zone material is normally supplied.
Common mistakes
- Using landscape-grade mulch under play equipmentplayground-grade rubber mulch is tested and certified for fall-height protection; landscape-grade is not rated for that and shouldn’t be used under swings or climbers.
- Under-ordering depth for fall zonesthe required depth depends on the equipment’s fall height — a taller slide or swing set needs more depth than a low playset, per ASTM F1292 guidance.
- Skipping a weed barrier underneathrubber mulch doesn’t break down and won’t smother weeds on its own over time; a fabric barrier underneath keeps the base weed-free long-term.
- Not containing the edgesrubber mulch migrates without solid edging, especially near doorways and high-traffic paths — plan for edging around the full perimeter.
- Assuming it needs yearly replenishing like wood mulchrubber mulch doesn’t decompose, so it rarely needs topping off — over-ordering “to be safe” each year wastes money.
- Ignoring odor and heat in full sunsome rubber mulch products can smell and get noticeably hot in direct summer sun; consider this for play areas used in peak heat.
What this calculator assumes
Adjust your result if your project differs from these.
- Depth is the finished spread depth, not a compacted or settled depth.
- Default material is landscape-grade rubber mulch at roughly 750 lb per cubic yard; playground-grade is similar in weight.
- 10% waste covers spillage and uneven spreading around edges and equipment.
- Prices are material only — delivery, edging, and weed barrier are separate.
- Playground fall-zone depth requirements should be confirmed against the specific equipment’s fall-height rating.
- Bag size is 0.5 cu ft, a common retail bag size for rubber mulch.
Common questions
How much rubber mulch do I need for a playground?
Fall-zone depth depends on equipment height — typically 6 inches for home playsets and up to 9 inches for taller certified equipment. Check the equipment’s fall-height rating before ordering.
Does rubber mulch need to be replaced every year?
No — unlike wood mulch, rubber mulch doesn’t decompose, so a single application can last many years with only occasional topping off.
Is rubber mulch safe for gardens?
It’s commonly used in ornamental beds and borders, though some gardeners prefer organic mulch around edible plants since rubber doesn’t break down into the soil.
How much does rubber mulch cost compared to wood mulch?
Rubber mulch costs significantly more upfront per ton than wood mulch, but it lasts many years longer, so the multi-year cost can be comparable or lower.
What depth of rubber mulch is safe under a swing set?
6 inches is the common minimum for typical residential swing sets and slides; taller equipment needs more depth per ASTM F1292 fall-height guidelines.
How much does a cubic yard of rubber mulch cover?
One cubic yard covers about 108 sq ft at 3 inches deep, or roughly 54 sq ft at 6 inches.
Is bulk or bagged rubber mulch cheaper?
Bulk is almost always cheaper per ton. For the calculator’s default 200 sq ft area at 3 inches, bulk runs about $319.44 versus $1,054.50 in bags.
Does rubber mulch get hot in the sun?
It can get noticeably warmer than wood mulch in direct summer sun, which is worth considering for play areas used during peak afternoon heat.
Can I put rubber mulch over grass?
It’s better to remove grass and lay a weed barrier first — rubber mulch on top of grass won’t fully suppress regrowth and can trap moisture against the turf.
What's the difference between playground and landscape rubber mulch?
Playground-grade mulch is tested and certified for fall-height impact protection; landscape-grade is a similar product sized and colored for garden beds but not rated for fall safety.
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Project
| Shape | — |
| Dimensions | — |
| Depth | — |
| Area | — |
| Material | — |
| Waste allowance | — |
Volume & weight (incl. waste)
| Cubic yards | — |
| Cubic feet | — |
| Weight | — |
| Tons (rounded up) | — |
Shopping list
| Bulk order | — |
| Bagged alternative (0.5 cu ft) | — |
| Estimated cost | — |
Notes
Estimate generated by materialcalculate.com. Assumes uniform depth and standard dry material densities. Confirm quantities with your supplier before ordering.