Stone Calculator
Crushed stone and aggregate are essential for driveways, drainage systems, and landscape features. Use this calculator to find out exactly how much stone you need in cubic yards, tons, or bags.
Worked Example
A homeowner is resurfacing a 30 × 10 ft driveway section with 4 inches of crushed limestone.
- 1 Driveway area: 30 × 10 = 300 sq ft
- 2 Volume: 300 × (4/12) = 100 cu ft = 3.7 cu yd
- 3 Add 10% waste: 3.7 × 1.10 = 4.1 cu yd
- 4 Weight: 4.1 × 1.28 = 5.2 tons
- 5 50-lb bags: (5.2 × 2000) / 50 = 208 bags
How Stone Is Calculated
The calculation follows a simple pipeline: measure the area, multiply by depth to get volume, then convert to the units your supplier sells.
Area × Depth = Volume (cu ft) → divide by 27 for cubic yards → multiply by material density for tons → divide by bag size for bag count. All quantities include your waste factor so you always have enough.
Densities are based on dry, loose material. Wet stone can weigh 10–20% more. All bag counts are rounded up — you can't buy half a bag.
Stone Type Selection Guide
| Stone Type | Best For | Notes |
|---|---|---|
| Crushed Limestone | Driveways & bases | Compacts well, affordable, general purpose |
| Fieldstone | Walls & landscape features | Natural look, ideal for stacking and borders |
| Drainage Stone | French drains & trenches | Large voids allow water flow, wrap pipe in fabric |
Frequently Asked Questions
What's the difference between gravel and stone? +
How deep should stone be for a driveway? +
Does crushed stone compact? +
How much does a cubic yard of stone weigh? +
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