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Landscape Stone Volume & Allowance Calculator

Estimate stone volume for rectangular or circular beds with an added allowance.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Edit a calculated value to solve backwards, or lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

A rectangular bed 5 meters long and 4 meters wide has an area of 20 m². At 10 centimeters deep it needs 2 m³ before allowance, or 2.2 m³ with 10% added.

Rectangle area = length × width; circle area = π × radius²; order volume = area × depth × (1 + allowance)

Worked example

Enter these known values and leave the other values blank.

Length
5 m
Width
4 m
Depth
10 cm
Waste factor
10 %
Bed shape
Rectangular
Total area
20 m²
Total landscaping rock needed
2.2 m³

Assumptions and limitations

  • It calculates volume only. Supplier bulk density and moisture affect weight. The allowance is an added fraction of geometric volume, not a material-specific compaction model.
  • Use consistent units and project-specific dimensions, density and prices. This geometric estimate does not add quantities that are absent from the formula.

Common questions

Does this calculate the stone’s weight?

It calculates volume only. Supplier bulk density and moisture affect weight. The allowance is an added fraction of geometric volume, not a material-specific compaction model.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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