Volume and weight
volume = length × width × depth × areastons = cubic yards × bulk densityThe selected extra percentage is applied before volume, weight, and bag quantities are displayed.
Gravel & topsoil calculator
Convert a rectangular coverage area into bulk volume, estimated weight, and full bags.
Enter the coverage area
Use separate calculations for areas with different depths, then add the order quantities.
Density is not universal
Topsoil, crushed stone, pea gravel, and river rock do not weigh the same. Moisture and compaction also matter, so use the supplier's density whenever possible.
Worked example
A 20 ft × 10 ft area at 3 in deep
Measured volume20 × 10 × (3 ÷ 12) = 50.00 ft³
Add 10%50.00 × 1.10 = 55.00 ft³
Convert to yards55.00 ÷ 27 = 2.04 yd³
At 1.4 tons/yd³2.04 × 1.4 = 2.85 tons
Area covered by one cubic yard
| Installed depth | Coverage from 1 yd³ |
|---|---|
| 1 inch | 324 ft² |
| 2 inches | 162 ft² |
| 3 inches | 108 ft² |
| 4 inches | 81 ft² |
| 6 inches | 54 ft² |
Loose placement, compaction, settlement, grade variation, and containment affect real coverage. Measure separate areas at their actual planned depths.