Landscape Rock Calculator
Estimate landscape-rock volume, bulk weight, full bags and cost from area, depth, waste, bulk density and package size.
Default project preview
7.13 short tons
Bulk volume
5.09 yd³
Rock bags
286
Base volume
4.63 yd³
Covered area
500 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Volume = area × depth. The allowance is applied before multiplying by bulk density. Bag count divides total weight by the entered bag weight.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Landscape Rock Calculator questions
Why does rock weight vary?+
Stone type, particle size, void space and moisture all change bulk density.
Should landscape fabric always be used?+
No. Fabric can help in some decorative-rock applications but may be unsuitable around changing plantings or where soil health is a priority.
How deep should decorative rock be?+
Depth depends on rock size, traffic, weed strategy and the underlying surface.