As an Amazon Associate I earn from qualifying purchases.
Size a gravel parking pad for cars, RVs, boats, or trailers, with the right depth for the load.
With these inputs:
| Result | Value |
|---|---|
| Gravel needed | 4.95 tons |
| Pad area | 162 sq ft |
| Volume | 3.3 yd³ |
| Estimated cost | $199 – $288 |
| Space size | 18 ft × 9 ft |
| Number of spaces | 1 |
| Total area | 162 sq ft |
| Base depth | 6 in compacted |
| Material | Crusher Run / #411 |
| Volume | 3.3 yd³ |
| Weight | 4.95 tons |
| Truck loads | 1 × 12 tons |
| Geotextile fabric | 178 sq ft |
| Edging (perimeter) | 54 linear ft |
Compact in lifts of no more than 4 inches. Vehicle pads fail at the edges first, so run the stone at least a foot past where the tires will sit.
Vehicle pads need more depth than a footpath and more than most people assume — an RV concentrates several tons onto four small contact patches. This calculator sizes the pad by vehicle count and type, then builds the depth to match the axle load.
Six inches of compacted base for cars, seven to eight for trucks and trailers, and ten or more for an RV. Depth is driven by axle load, not by pad size.
Nine by eighteen feet for a car and ten by twenty for a truck or SUV. An RV needs twelve by forty, and a boat on a trailer about ten by thirty.
Need the whole roof at once? The free roofing calculator works out roof area, squares, shingle bundles, underlayment, drip edge, ridge cap and installed cost from one set of measurements.