The Formula
Square Feet × Depth (inches) ÷ 324 = Cubic Yards of Bark
- Example: 400 sq ft bed at 3 inches: 400 × 3 ÷ 324 = 3.7 yd³
- Order in 0.25 yd³ increments when buying bulk
- Add 10% for edges, unevenness, and settling
Calculate Your Bark Order
Enter dimensions and depth for exact cubic yards and bag count.
Open Bark Calculator →How Deep Should Bark Be?
| Application | Recommended Depth | Notes |
|---|---|---|
| Garden beds (fine bark) | 2 – 3 inches | Weed suppression without smothering |
| Garden beds (chunky bark) | 3 – 4 inches | Larger nuggets need more depth to fill |
| Under trees (donut) | 3 – 4 inches | Keep clear of trunk; 2 ft diameter min |
| Pathways & walkways | 3 – 4 inches | Deeper for foot traffic stability |
| Slopes & erosion | 3 – 4 inches | Use fine shredded bark (not chunks) |
| Play areas | 6 – 12 inches | CPSC: 9" for falls from 4 ft height |
💡 Fine vs chunky bark
Fine shredded bark knits together to resist washing and is better on slopes and windy sites. Chunky bark nuggets look better in formal gardens but shift more easily and need deeper application.
Coverage Table
| Cubic Yards | At 2" Deep | At 3" Deep | At 4" Deep |
|---|---|---|---|
| 0.5 yd³ | 81 sq ft | 54 sq ft | 40 sq ft |
| 1 yd³ | 162 sq ft | 108 sq ft | 81 sq ft |
| 2 yd³ | 324 sq ft | 216 sq ft | 162 sq ft |
| 3 yd³ | 486 sq ft | 324 sq ft | 243 sq ft |
| 5 yd³ | 810 sq ft | 540 sq ft | 405 sq ft |
| 10 yd³ | 1,620 sq ft | 1,080 sq ft | 810 sq ft |
Bark Types Compared
| Bark Type | Weight / Yd³ | Cost / Yd³ | Best Use |
|---|---|---|---|
| Pine bark nuggets (large) | 250 – 350 lbs | $25 – $45 | Decorative beds; stays looking fresh |
| Cedar bark chips | 350 – 500 lbs | $35 – $60 | Insect deterrent; long-lasting |
| Fir bark (mini nuggets) | 300 – 400 lbs | $30 – $50 | General bed mulch; good coverage |
| Hemlock bark | 350 – 450 lbs | $30 – $50 | Fine texture; paths and beds |
| Playground/play bark | 400 – 600 lbs | $40 – $70 | Play areas; CPSC impact protection |
FAQ
How many cubic yards of bark in a truck load?
- Small delivery (5 yd³): 1,250–3,000 lbs of bark (well within typical truck limits)
- Standard tandem (10 yd³): 2,500–6,000 lbs — check supplier specs
Does bark mulch need to be replaced?
- Pine bark nuggets: Every 2–3 years
- Cedar bark: Every 2–4 years (slow decomposing)
- Fine shredded bark: Annually — top up with 1–2 inches each spring