Shed Base Gravel Calculator (Crusher Run Pad)
Estimate compacted gravel depth, cubic yards, and tons for 8x10, 10x12, and 12x16 storage shed foundations.
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 Shed 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 |
|---|---|---|---|
| Small Prefab Shed (8x10) | 4 Inches | Crusher Run / Dense Grade Aggregate | A 10x12 excavated pad with 4 inches of compacted base needs about 1.78 cubic yards or 2.4 tons. |
| Large Workshop Shed (12x16) | 6 Inches | Geotextile + Crusher Run | A 14x18 pad at 6 inches needs about 5.2 cubic yards or 7.2 tons before compaction allowance. |
| Timber-Framed Perimeter | 4 to 6 Inches | Washed #57 in Center | Keeps the interior floor dry while pressure-treated timbers contain the base. |
💡 Contractor Installation Pro Tips
- Excavate turf and add 2 to 4 inches of large #2/#3 stone before the crusher run top for better drainage on clay soil.
- Build the pad at least 1 foot larger on every side so rain dripping from the roof drains away instead of eroding the shed floor.
Frequently Asked Questions About Shed Base Gravel Calculator
How much gravel do I need for a 10x12 shed base?
At a 4-inch compacted depth, a 10x12 pad requires about 1.48 cubic yards. With 15% compaction allowance and dense grade aggregate at 3,000 lbs/yd³, order roughly 2.1 to 2.4 tons.
What is the best gravel for a shed base?
Crusher Run (dense grade aggregate) is best because its mixture of angular stone and fines compacts into a firm, level pad; clean #57 stone is better used beneath it for drainage.
Missing a Stone Type or Have Feedback?
We update density presets and formulas regularly based on local quarry feedback.