Area Length (feet) Enter the length of the area to cover (e.g., 20)

Area Width (feet) Enter the width of the area to cover (e.g., 10)

Stone Depth (inches) Enter the depth of the stone layer (e.g., 2 for 2 inches)

Stone Density (lbs per cubic foot) Enter material density (typical: 100-150, e.g., 100 for gravel)

Common Stone Densities: Gravel/Crushed Stone: 100 lb/ft³, Limestone: 120 lb/ft³, Granite: 150 lb/ft³, Sand: 100 lb/ft³

Quick Examples:

Small Garden Path Driveway Stone Base

Calculate Clear

This calculator is for informational purposes only. Verify results with appropriate professionals for important decisions. Material requirements may vary based on compaction, waste factors, and site conditions.

Use this free online Stone Calculator to calculate your total stone requirements. Simply enter your area length, width, stone depth, and material density to instantly get results in tons and cubic feet. The estimate helps you order the right amount of crushed stone, gravel, or aggregate for your project.

How Total Stone Required Is Calculated

The Stone Calculator converts your area dimensions and desired depth into total weight. First, it finds the volume in cubic feet by multiplying length, width, and depth converted from inches to feet. Then it multiplies the volume by the material density to get total pounds. Finally, it divides by 2,000 to convert pounds to tons.

This formula works well for standard crushed stone and gravel projects. The result is an estimate that helps with planning and ordering, but actual needs may vary based on compaction and waste.

What Your Stone Calculator Result Means

The total tons result tells you how much stone material to order for your project. For example, if your result is 5 tons, you would need to order approximately 5 tons of crushed stone or gravel to cover the specified area at your desired depth. Most suppliers deliver stone in full or half-ton increments.

The volume in cubic feet shows the total space the stone will occupy. This helps when comparing different materials or planning storage and transport. A typical pickup truck bed holds about 1.5 to 2 cubic yards (40 to 54 cubic feet) of material.

Consider ordering 5-10% extra to account for compaction, uneven ground, and waste during installation. For projects deeper than 4 inches, compacting in layers produces better results.

Accuracy, Limitations & Common Mistakes of the Stone Calculator

How Accurate Is the Stone Calculator?

The calculator provides a close estimate for standard rectangular or square areas with consistent depth. The formula uses the density value you enter, so accuracy depends on knowing your material's true density. Most crushed stone products fall between 100 and 150 pounds per cubic foot. Actual weight can vary by 5-10% based on moisture content and particle size.

Limitations of the Stone Calculator

The calculator assumes flat, level surfaces with uniform depth. It does not account for compaction, which can reduce volume by 15-30% depending on the material and method. Irregular shapes, slopes, and curved edges require breaking the area into smaller rectangles. The tool also cannot predict waste from spillage, over-excavation, or material settling over time.

Common Mistakes to Avoid

• Forgetting to add extra material: Order 5-10% more than calculated to account for compaction and waste during spreading.
• Using the wrong density value: Check with your supplier for the specific density of the stone product you plan to use.
• Measuring in the wrong units: Enter length and width in feet and depth in inches, then double-check all inputs before calculating.
• Ignoring site conditions: Sloped, uneven, or irregular areas may require more material than a flat rectangular calculation suggests.

Frequently Asked Questions

Who is this Stone Calculator for?

This calculator is for homeowners, landscapers, contractors, and DIY enthusiasts planning projects that require crushed stone, gravel, or aggregate materials. It works well for garden paths, driveways, patios, drainage projects, and decorative stone installations.

How do I find the density of my stone material?

Most crushed stone and gravel products have a density between 100 and 150 pounds per cubic foot. Gravel and crushed stone typically weigh about 100 lb/ft³, limestone around 120 lb/ft³, and granite about 150 lb/ft³. Ask your supplier for the exact density of the specific material you plan to purchase.

Should I order more stone than the calculator shows?

Yes, ordering 5-10% extra is a common practice. Compaction during installation reduces volume, and some material may be lost to waste or uneven ground. Having extra material prevents delays if you run short during your project.

Can I use this calculator for irregular-shaped areas?

For irregular shapes, divide the area into smaller rectangles or squares, calculate each separately, and add the results together. For circular areas, use the formula for area (3.14 × radius squared) to find the square footage, then use that value for length times width.

Is the Stone Calculator free to use?

Yes, this calculator is completely free with no sign-up required. It works on any device with a web browser.