Landscape Rock Calculator
Use supplier coverage for the selected rock size and depth, while keeping a separate geometry cross-check for the bed volume.
- Net coverage area
- 300 ft²
- Area with waste
- 315 ft²
- Volume cross-check
- 50 ft³ (1.85 yd³)
- Bulk order weight
- 6,300 lb
- Equivalent whole bags
- 126 × 50 lb
The tonnage uses your supplier’s area-per-ton coverage at the selected rock size and depth. The volume is a geometry cross-check.
Show calculation
300 ft² × (1 + 5%) ÷ 100 ft²/ton = 3.15 US short tonsTransparent method and editable product assumptions. Verify current labels and project requirements.
How this calculator works
This calculator uses the supplier’s stated area covered by one US short ton for the selected rock size and installation depth. That workflow reflects how decorative landscape rock is often quoted.
The area is increased once by your extra-material allowance and divided by coverage. The result stays in clearly labeled 2,000 lb US short tons, with a mass-based bag comparison.
A separate area × depth volume is shown as a cross-check. It does not override supplier coverage, because rock size, grading, voids, and material condition change the weight-to-volume relationship.
Formula
US short tons = area × (1 + waste) ÷ supplier ft²-per-ton coverage; geometry volume = area × depthThe live substitution appears with your result.Control example: supplier coverage
A 300 ft² bed plus 5% extra requires coverage for 315 ft².
At 100 ft² per US ton, order quantity is 3.15 short tons before supplier delivery increments.
Assumptions and limits
- Coverage is from the actual supplier and rock size.
- Coverage depth matches the depth entered for the cross-check.
- A ton means a 2,000 lb US short ton.
- The area does not overlap and has a reasonably uniform installed depth.
Common measuring mistakes
- Applying one rock-size coverage table to every decorative stone.
- Confusing a metric tonne with a US short ton.
- Using a generic gravel density when a supplier coverage value is available.
Sources
Product-specific values remain editable. These sources support the method and stated examples; they are not a universal substitute for your supplier’s current label.
- Methodology: user-supplied coverage GQ Calc keeps supplier coverage and the geometry cross-check separate; no universal decorative-rock preset is asserted.
Questions people ask
How many square feet does a ton cover?
It depends on rock size, grading, and depth. Use the supplier table for the exact material.
Why show cubic yards too?
Volume is a useful geometry cross-check and may help with suppliers quoting by volume, but it does not create a universal ton conversion.
Can I use this for generic base gravel?
Use a volume-and-density workflow or Paver Base Calculator. This page is specifically organized around decorative coverage by size and depth.