Project Inputs
US units
lb/ft³
Automatically converts areas, depth, and density.
Pick typical density; override below if needed.
lb/ft³
Leave blank to use selected gravel type.
%
Covers cutting, compaction, spillage.
Areas
| Shape | Length | Width | Diameter | Depth | Notes |
|---|
Length/Width in feet (US) or meters (Metric). Depth supports inches/feet or centimeters/meters per selector.
For retail bag estimates.
tons
Estimate number of truckloads.
$ / ton
$ / yd³
Provide one or both to see cost range.
Results Summary
Total volume
0.000 yd³
0.000 m³
Estimated weight
0.000 tons
0 kg
Bag estimate
0 bags
using 50 lb bags
Truckloads
0 loads
at 10 tons capacity
Cost estimate
$0.00
based on provided rates
Coverage quick check: at 2 in depth, 1 ton typically covers ~80–100 ft² depending on density and compaction.
Area Breakdown
| # | Shape | Dimensions | Area | Volume |
|---|
Example Gravel Densities
| Type | Density (lb/ft³) | Density (kg/m³) | Typical cover at 2 in (ft²/ton) | Notes |
|---|---|---|---|---|
| Pea gravel | 95 | 1522 | ~95 | Rounded, good drainage |
| Crushed stone | 100 | 1602 | ~90 | Angular, locks well |
| Dry gravel | 90 | 1442 | ~100 | Lighter, less moisture |
| Damp gravel | 110 | 1762 | ~80 | Heavier due to moisture |
| Road base | 105 | 1682 | ~85 | Mixed fines, compacts |
Formulas Used
- Rectangle area:
A = L × W - Circle area:
A = π × (D/2)² - Depth conversion: inches→ft:
in ÷ 12, cm→m:cm ÷ 100 - Volume:
V = A × depth(ft³ or m³) - Cubic yards:
yd³ = ft³ ÷ 27; kilograms:kg = m³ × kg/m³ - Weight (tons):
tons = (ft³ × lb/ft³) ÷ 2000orkg ÷ 1000 - Waste factor: multiply by
(1 + waste%).
Outputs reflect your selected density unit automatically.
How to Use
- Select the unit system and a gravel type.
- Add each area row, choose shape, and enter dimensions.
- Set depth and waste. Optionally override density and costs.
- Set bag size and truck capacity as needed.
- Press Calculate to see results and breakdown.
- Use CSV or PDF buttons to export summaries and tables.
Tip: Use
Tab to jump fields while adding areas quickly.FAQs
Common driveway layers range 2–4 inches for top dressing and 4–6 inches for base, depending on soil and load. Always follow local specifications.
Presets are typical values. Real density varies with moisture, particle shape, and fines. Use supplier data when available or override with a measured bulk density.
Choose a unit system for plan dimensions; depth and bag size have their own units so you can mix them conveniently. The calculator handles conversions automatically.
After computing base volume and weight, totals are multiplied by
(1 + waste%/100) to include cutting, compaction, spillage, and ordering buffer.Some suppliers quote by ton, others by cubic yard. Enter one or both to get a cost range or to match your vendor’s pricing model.
Yes. Use the “Export Table CSV” and “Export Table PDF” buttons in the Area Breakdown card to export just the per-area computation table.