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Stone Calculator

Estimate stone cubic yards, tons, waste-adjusted tons, and optional material cost for rectangular, triangular, or circular areas.

For rectangles and triangles, enter length in feet.

For rectangles and triangles, enter width in feet.

For circles, enter diameter in feet.

Enter stone depth in inches.

Stone density varies. Many crushed stone products are around 1.4 to 1.7 tons per cubic yard.

Optional extra percentage for ground variation, compaction, and supplier rounding.

Optional material price for a rough cost estimate.

Status: initial

Results

Awaiting calculation

Guide

Introduction

The Stone Calculator estimates decorative stone, crushed stone, river rock, cobblestone, or landscape rock quantity from area dimensions, depth, density, waste, and optional price.

The calculator finds area, converts depth from inches to feet, calculates cubic yards, then multiplies by a tons-per-cubic-yard density factor.

Formula and method guide

Cubic yards

Cubic yards = area x depth(ft) / 27

Cubic yards are a common bulk volume measure for landscaping stone.

Tons

Tons = cubic yards x tons per cubic yard

Many stone suppliers sell by ton, so volume is converted to weight.

Waste-adjusted tons

Tons with waste = tons x (1 + waste / 100)

The waste-adjusted value is the planning order quantity.

Variables

Shape

The area shape used for the surface calculation.

Length and width

Rectangle and triangle dimensions in feet.

Diameter

Circle diameter in feet.

Depth

Planned stone depth in inches.

Density

Tons per cubic yard for the selected stone material.

Waste allowance

Extra material for site and ordering variation.

FAQs

What does this Stone Calculator calculate?
It estimates area, cubic yards, stone tons, tons with waste, and optional material cost.
What formula is used?
Cubic yards equals area times depth in feet divided by 27. Tons equals cubic yards times tons per cubic yard.
Can I calculate circular stone areas?
Yes. Choose circle and enter diameter.
Can I calculate triangular stone beds?
Yes. Choose triangle and enter length and width.
What density should I use?
Use your supplier's density when possible. Many crushed stone products are roughly 1.4 to 1.7 tons per cubic yard.
Does this work for lava rock?
Yes, but lava rock is lighter than many stones, so enter an appropriate density.
Does this work for river rock?
Yes, if you enter the correct tons-per-cubic-yard value from your supplier.
Does this work for rip rap?
It can estimate volume and tons, but large rip rap often needs supplier or engineering confirmation.
Why include waste?
Waste helps account for site variation, compaction, spreading, and supplier rounding.
Does this include delivery?
No. Optional cost includes material price only.
Is a cubic yard always the same weight?
No. Cubic yards measure volume; weight depends on material density.
Can I use this for gravel?
The math is similar, but the Gravel Calculator is tuned for gravel-specific wording and defaults.
Can I use this for mulch?
Use the Cubic Yard Calculator or a mulch-specific calculator because mulch is much lighter than stone.
Should I round up?
Suppliers may sell by whole or half tons/yards, so confirm local ordering rules.
Is this exact?
No. It is a planning estimate and should be confirmed before ordering.

References

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