Playground Safety Pea Gravel Calculator
Compute cubic yards and tons of smooth, rounded pea stone for shock-absorbing playground and playset impact zones.
1. Select Project Shape
2. Enter Dimensions
3. Select Gravel Aggregate & Density
4. Add Waste & Compaction Buffer
Gravel Layer & Excavation Cross-Section Simulator
Visualize multi-layer ground excavation, plate compaction settling, and dump truck hauling logistics in real-time.
To achieve a final compacted depth of 6.0 inches, you must spread 7.1 inches of loose uncompacted aggregate before running the plate compactor.
Recommended Depth & Base Specifications for Playground Pea Gravel Calculator
Selecting the proper installation depth is the single most critical factor in preventing premature rutting, sinking, or weed breakthrough.
| Layer / Application | Recommended Depth | Stone Aggregate Type | Contractor Notes |
|---|---|---|---|
| Low Play Equipment (< 4 ft height) | 6 Inches | Round Washed Pea Gravel | Suitable for small toddler playhouses and low balance beams. |
| Standard Playset (5 to 7 ft fall height) | 9 Inches | Round Washed Pea Gravel | Meets CPSC & ASTM shock-attenuation benchmarks for residential swing sets. |
| High Swings & Slides (8+ ft height) | 12 Inches | Round Washed Pea Gravel | Provides heavy shock absorption; inspect and rake loose stone monthly. |
💡 Contractor Installation Pro Tips
- Only use smooth river-washed pea gravel (ASTM F1292 compliant). Never use angular crushed limestone which compacts and causes skin abrasions.
- Allow for 25% displacement loss under high swings and slide exits; top up gravel annually.
Frequently Asked Questions About Playground Pea Gravel Calculator
Is pea gravel safe for playground fall zones?
Yes, smooth 3/8" rounded pea gravel is an approved impact-absorbing surface by the US Consumer Product Safety Commission (CPSC) when maintained at 9-12 inches depth.
How many tons of pea gravel do I need for a 20x20 playground?
At a 9-inch safety depth, a 20x20 ft playground requires approx. 11.1 cubic yards or 15.5 tons of pea gravel.
Missing a Stone Type or Have Feedback?
We update density presets and formulas regularly based on local quarry feedback.