Gravel Calculator
Multiply area by depth to find cubic yards, then convert to tons using gravel’s typical density of about 1.4 tons per cubic yard.
Quick Answer
Multiply area by depth to find cubic yards, then convert to tons using gravel’s typical density of about 1.4 tons per cubic yard.
Gravel Calculator
Enter your values below for an instant result, then see the formula, worked example, and common mistakes.
Enter your values and click calculate.
How to Use This Calculator
Measure the length and width of the space you’re covering in feet.
2-3 inches is typical for a topping layer; 4-6 inches for driveways and load-bearing bases.
Gravel is sold by weight (tons) or volume (cubic yards) depending on your supplier — this calculator gives both.
Compaction and uneven ground usually mean you’ll use slightly more than the flat-math estimate.
Formula
Cubic yards = (Length x Width x Depth in feet) / 27. Tons = cubic yards x 1.4 (typical gravel density).
Reference Table: Typical Gravel Depth by Use
| Use | Typical depth |
|---|---|
| Decorative topping / mulch replacement | 2 inches |
| Walkways and garden paths | 2-3 inches |
| Patio base / drainage layer | 4 inches |
| Driveway base | 4-6 inches (compacted, often in layers) |
Common Mistakes to Avoid
- Using a flat density number for all gravel types — crushed stone, pea gravel, and river rock all weigh slightly differently.
- Not accounting for compaction, which can reduce final depth by 10-20% versus loose fill.
- Forgetting edging/border material needed to contain gravel on paths and driveways.
- Ordering by volume from a supplier that sells by weight (or vice versa) without converting first.
When the Estimate May Be Wrong
Gravel density varies by material (crushed stone, pea gravel, river rock) and moisture content, typically 1.2 to 1.5 tons per cubic yard. For large or structural projects (driveways, retaining walls), confirm the exact density with your supplier before ordering.
FAQs
How much gravel do I need for a 10×10 area?
At 3 inches deep, about 0.93 cubic yards or roughly 1.3 tons.
How many tons of gravel are in a cubic yard?
About 1.4 tons per cubic yard for typical crushed gravel, though this varies by material.
How deep should a gravel driveway be?
Most gravel driveways use 4-6 inches of base material, often compacted in multiple layers.
Sources and Methodology
Gravel density estimate (~1.4 tons per cubic yard) reflects common published values for crushed stone/gravel aggregate; exact density varies by material type and should be confirmed with your supplier for large orders.
