How to use it
- Enter the bed shape and size.
- Enter the depth of stone you want.
- Pick the stone type, or enter your supplier's density for a custom stone.
- Choose bulk, weight or bags, and check What to Buy.
Formula and assumptions
- Volume = area × depth
- Volume with waste = volume × (1 + waste % ÷ 100)
- Weight = volume with waste × density
Order amounts always round up, never down. Prices apply to the rounded amount, in the unit your supplier sells by. See the methodology for constants and indicative densities.
Example
A round bed 8 ft across, 3 in of river rock, 5% waste:
- Before waste: 0.47 cu yd (0.36 m³)
- With waste: 0.49 cu yd (0.37 m³)
- Suggested order: 0.5 cubic yards
Questions
Do all decorative stones weigh the same?
No. River rock, pea gravel and crushed stone pack differently, and density changes with size and moisture. The defaults are labelled indicative. Use your supplier's number if you have it.
How deep should decorative rock be?
It depends on stone size and the look you want. Larger stones usually need more depth to cover the ground. The depth buttons are just shortcuts.
Should I use landscape fabric under stone?
Many people do, to reduce weeds. Fabric isn't calculated in this version.