Stone Calculator
Calculate stone in cubic yards, cubic feet, tons, and pounds for rectangular or circular areas. Use an editable bulk density, project allowance, and local price to estimate landscaping stone, crushed stone, stone dust, or graded aggregate.
Calculate Stone Quantity
Enter finished project dimensions. Results include your extra material percentage.
Weight varies with grading, moisture, void space, and compaction. Replace the default density with your supplier’s value when available.
How to Use the Stone Calculator
Choose the area shape and measurement units, enter the finished stone depth, and select the nearest material type. Edit density when your supplier provides a product value, then add a project allowance and local price if needed.
1. Measure the surface
Use length and width for a rectangle. For a circle, enter the diameter. Divide an irregular area into smaller shapes and calculate each part.
2. Enter the gravel depth
Use the compacted depth required for the project. Decorative cover, paths, driveways, and drainage work can require different depths.
3. Check volume and weight
Compare cubic yards and tons with the supplier’s sales unit, minimum order, delivery limit, and rounding method before purchasing.
How Much Stone Do I Need?
Stone quantity begins with surface area and installed depth. The calculator normalizes units, finds cubic feet, and divides by 27 for cubic yards.
Estimated tons and pounds depend on bulk density. Stone size, grading, moisture, void space, and compaction can change the weight of the same volume.
Calculate different base and finish layers separately when they use different stone types, depths, or densities.
Stone Coverage by Area and Depth
Values show cubic yards before adding extra material.
| Area | 2 inches | 3 inches | 4 inches |
|---|---|---|---|
| 100 sq ft | 0.62 yd³ | 0.93 yd³ | 1.23 yd³ |
| 250 sq ft | 1.54 yd³ | 2.31 yd³ | 3.09 yd³ |
| 500 sq ft | 3.09 yd³ | 4.63 yd³ | 6.17 yd³ |
| 1,000 sq ft | 6.17 yd³ | 9.26 yd³ | 12.35 yd³ |
Stone for Different Projects
Match the selected stone and depth to the actual project specification.
Landscape beds
Decorative stone beds require accurate surface dimensions and installed depth. Fabric, edging, and existing material can affect preparation.
Bases and hardscape
Patios, pavers, and paths may use compacted aggregate layers. Calculate each material layer separately.
Drainage areas
Drainage stone size and placement depend on the system. Quantity estimates do not replace drainage design or site evaluation.
Measurements, Assumptions, and Ordering
Measure the area more than once and use the finished depth. Replace general density with supplier data whenever possible. This stone calculator estimates material quantity and cost but does not approve base design, drainage, structural loading, or construction methods.
Stone Calculator FAQ
How do I calculate stone in cubic yards?
Multiply area by depth in feet and divide cubic feet by 27.
How do I convert stone yards to tons?
Multiply cubic yards by the selected bulk density in tons per cubic yard.
How much stone covers 100 square feet?
At 3 inches deep, 100 square feet uses about 0.93 cubic yard before allowance.
Can I calculate a circular stone bed?
Yes. Enter the diameter and the calculator uses circle area before applying depth.
Why does stone weight vary?
Gradation, moisture, compaction, and void space change bulk density.
Should each stone layer be calculated separately?
Yes, when materials, depths, or densities are different.