Crushed Stone Calculator
Calculate the volume and weight of crushed stone needed for a project area based on dimensions and depth, with support for various stone types and their specific densities.
This free online crushed stone calculator provides instant results with no signup required. All calculations run directly in your browser — your data is never sent to a server. Enter your values below and see results update in real time as you type. Perfect for everyday calculations, homework, or professional use.
Range: 1 – 1000
Length of the area in feet.
Range: 1 – 500
Width of the area in feet.
Range: 0.5 – 24
Desired depth of crushed stone in inches.
Different stone types have different densities.
Results
Volume
66.7 cu ft
Volume
2.47 cu yd
Weight
3.46 tons
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Crushed Stone Calculator. Most fields include unit selectors so you can work in your preferred unit system — metric or imperial, whichever matches your problem.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors and can produce results that are off by factors of 2, 10, or more.
Read the results
The Crushed Stone Calculator instantly computes the output and displays results with units clearly labeled. All calculations happen in your browser — no loading time and no data sent to a server.
Explore parameter sensitivity
Try adjusting individual input values to see how the output changes. This is a quick and effective way to develop intuition about how different parameters influence the result and to identify which inputs have the largest effect.
Formula Reference
Crushed Stone Calculator Formula
See calculator inputs for the governing equation
Variables: All variables and their units are labeled in the calculator interface above. Input fields accept values in multiple unit systems — select your preferred unit from the dropdown next to each field.
When to Use This Calculator
- •Use the Crushed Stone Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
- •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
- •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
- •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.
About This Calculator
The Crushed Stone Calculator is a free, browser-based calculation tool for engineers, students, and technical professionals. Calculate the volume and weight of crushed stone needed for a project area based on dimensions and depth, with support for various stone types and their specific densities. It implements standard formulas and supports both metric (SI) and imperial unit systems with automatic unit conversion. All calculations are performed instantly in your browser with no data sent to a server. Use this calculator as a quick reference and sanity-check tool during design, analysis, and learning. Always verify results against primary engineering references and applicable standards for any safety-critical application.
About Crushed Stone Calculator
Crushed stone is a fundamental construction material used for drainage beds, road bases, retaining wall backfill, French drains, and decorative landscaping. Ordering the correct quantity requires converting your project area dimensions into the cubic yards or tons that suppliers quote. This calculator handles the math of converting length, width, and depth measurements into volumetric and weight quantities, accounting for the specific density of your chosen stone type. Different crushed stone products have meaningfully different densities: crusher run with its mix of stone and fine particles is the densest at about 1.45 tons per cubic yard, while pea gravel with its round, loosely packed particles averages only 1.3 tons per cubic yard. Getting the density right prevents both shortages that delay your project and overorders that waste money and leave excess material piled on your property.
The Math Behind It
Formula Reference
Crushed Stone Volume and Weight
Volume = L x W x (D/12); Tons = Cu Yd x Density
Variables: L, W in feet; D in inches; Density varies by stone type (1.3-1.45 tons per cubic yard).
Worked Examples
Example 1: French drain backfill
A trench 40 feet long, 1.5 feet wide, 12 inches deep filled with crushed granite.
The French drain needs approximately 2.22 cubic yards (3.0 tons) of crushed granite.
Example 2: Parking pad base layer
A 20 x 10 foot parking pad with 4-inch crusher run base.
The parking pad requires about 2.47 cubic yards (3.58 tons) of crusher run.
Common Mistakes & Tips
- !Using the wrong density for the stone type, which can cause a 10-15 percent error in weight calculations and lead to over or under ordering.
- !Forgetting to convert inches to feet for the depth dimension before multiplying, which produces a result 12 times too large.
- !Not adding a compaction and waste factor of 5-10 percent, which leaves you short of material on delivery day.
Related Concepts
Used in These Calculators
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Frequently Asked Questions
What is the difference between gravel and crushed stone?
Crushed stone is mechanically produced from larger rocks and has angular, irregular shapes that interlock well. Gravel is naturally occurring rounded stone formed by water erosion. Crushed stone compacts better and provides more stability for construction applications, while rounded gravel is preferred for decorative uses and walkways where bare feet may contact the surface.
How many tons of crushed stone do I need per cubic yard?
The conversion depends on the stone type: crushed limestone averages 1.4 tons per cubic yard, granite averages 1.35, pea gravel averages 1.3, and crusher run (a blend of stone and fines) averages 1.45 tons per cubic yard. These are bulk density values for loose, uncompacted material as delivered by the supplier.
Should I compact crushed stone after laying it?
Yes, for structural applications like driveways, walkways, patios, and building foundations, crushed stone should be compacted in lifts of 2-4 inches using a plate compactor or roller. Compaction increases density, improves load-bearing capacity, and prevents settling. For drainage-only applications like French drains, compaction is not needed as it would reduce the void space necessary for water flow.