Rock Yard Calculator
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Rock Yard Calculator
Your Project Estimate
Enter details above to get started.
Understanding Your Rock Yard Needs
Creating a rock yard, whether for landscaping, drainage, or a durable surface, requires careful planning and accurate material estimation. This calculator helps you determine the volume of material needed in cubic yards and the estimated cost, taking into account the dimensions of your project area and the type of rock you intend to use.
How the Calculation Works
The process involves several steps:
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Calculate Area: The length and width of your project area are multiplied to find the total square footage.
Area (sq ft) = Length (ft) × Width (ft)
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Convert Depth to Feet: The desired depth is usually measured in inches, but for volume calculations, it needs to be converted to feet.
Depth (ft) = Depth (inches) / 12
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Calculate Volume in Cubic Feet: The area in square feet is multiplied by the depth in feet.
Volume (cu ft) = Area (sq ft) × Depth (ft)
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Convert Volume to Cubic Yards: Since construction materials are typically sold by the cubic yard, the volume in cubic feet is converted. There are 27 cubic feet in 1 cubic yard.
Volume (cu yd) = Volume (cu ft) / 27
-
Estimate Tons Needed: Different types of rock and aggregate have varying densities. We use an average weight per cubic yard for common materials. This calculator uses a multiplier based on the selected rock type to estimate the total tonnage.
Tons Needed = Volume (cu yd) × Weight per Cubic Yard (tons/cu yd)
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Calculate Total Cost: Finally, the estimated tons needed are multiplied by the cost per ton to get the total estimated project cost.
Total Cost = Tons Needed × Cost per Ton ($/ton)
Key Considerations:
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Rock Type: The density (weight per cubic yard) varies significantly between different materials like gravel, decorative stones, sand, and crushed rock. Always confirm the approximate density of your chosen material.
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Compaction: Some materials compact more than others once laid and settled. It's often advisable to order slightly more material than calculated to account for this. A common recommendation is to add an extra 5-10% for compaction.
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Delivery Fees: This calculator does not include delivery fees, which can add a significant amount to the total cost depending on your location and the quantity ordered.
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Waste: Factor in potential waste during installation, especially for intricate designs or irregularly shaped areas.
Use this calculator as a starting point for your project budgeting. Always double-check your measurements and consult with your material supplier for the most accurate density and pricing information.
function calculateRockYardage() {
var length = parseFloat(document.getElementById("areaLength").value);
var width = parseFloat(document.getElementById("areaWidth").value);
var depthInches = parseFloat(document.getElementById("depthInches").value);
var rockTypeMultiplier = parseFloat(document.getElementById("rockType").value);
var costPerTon = parseFloat(document.getElementById("costPerTon").value);
var resultDiv = document.getElementById("result");
// Input validation
if (isNaN(length) || isNaN(width) || isNaN(depthInches) || isNaN(rockTypeMultiplier) || isNaN(costPerTon) ||
length <= 0 || width <= 0 || depthInches <= 0 || costPerTon < 0) {
resultDiv.innerHTML = "Please enter valid positive numbers for all fields.";
return;
}
var areaSqFt = length * width;
var depthFt = depthInches / 12;
var volumeCuFt = areaSqFt * depthFt;
var volumeCuYd = volumeCuFt / 27;
// Estimate tons based on rock type multiplier
var tonsNeeded = volumeCuYd * rockTypeMultiplier;
// Calculate total cost
var totalCost = tonsNeeded * costPerTon;
// Format the output
var formattedOutput = "
Cubic Yards Needed: " + volumeCuYd.toFixed(2) + " cu yd" +
"
Tons Needed: " + tonsNeeded.toFixed(2) + " tons" +
"
Estimated Cost: $" + totalCost.toFixed(2);
resultDiv.innerHTML = formattedOutput;
}