Paver Base Gravel & Bedding Sand Calculator
Calculate gravel sub-base and setting sand requirements to prevent sinking and shifting patio pavers.
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 Paver Base 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 |
|---|---|---|---|
| Crushed Aggregate Base (CAB) | 4 to 6 Inches | Crusher Run / Dense Grade | Compacted in 2-inch lifts with a plate compactor to 98% density. |
| Coarse Bedding Sand Layer | 1 Inch (Uniform) | Concrete Bedding Sand (ASTM C33) | Screeded perfectly level without pre-compaction before setting pavers. |
| Joint Sanding | Top Joint | Polymeric Jointing Sand | Swept into gaps and misted to activate binder polymers and lock pavers. |
💡 Contractor Installation Pro Tips
- Never use fine masonry sand for paver bedding; use coarse angular concrete sand (ASTM C33) to allow moisture drainage without washouts.
- Extend the crushed base 6 inches past the paver perimeter to give concrete or plastic edge restraints solid support.
Frequently Asked Questions About Paver Base Gravel Calculator
How many inches of gravel base is required under patio pavers?
For pedestrian patios and walkways, 4 inches of compacted aggregate base is recommended. For vehicular driveways, 8 to 10 inches is required.
Can I lay pavers directly on gravel without sand?
No. The 1-inch bedding sand layer allows micro-adjustments for perfectly flush paver alignment and absorbs ground expansion.
Missing a Stone Type or Have Feedback?
We update density presets and formulas regularly based on local quarry feedback.