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Professional Gravel & Stone Calculator

Rectangular Area (Driveways/Patios) Circular Area (Firepits/Roundabouts)

Estimated Materials Required:

Cubic Yards 0

Total Tons (Approx) 0

Cubic Feet 0

50lb Bags 0

How to Use the Gravel Calculator

Planning a landscaping project, driveway, or drainage solution requires precision. This gravel calculator helps you determine exactly how many cubic yards or tons of stone you need to order, preventing overspending or project delays.

Step-by-Step Calculation Guide

1. Select Shape: Choose between a rectangular area (most driveways and paths) or a circular area (fire pits or garden features).
2. Enter Dimensions: Provide the length and width in feet. For circular areas, provide the diameter.
3. Determine Depth: Standard depths are typically 2-4 inches for walkways and 4-8 inches for driveways.
4. Include Waste: We recommend a 5-10% waste factor to account for compaction and uneven subgrades.

Example Calculation: Standard Driveway

If you have a driveway that is 20 feet long and 10 feet wide, and you want a gravel depth of 4 inches:

• Area: 200 square feet
• Volume: 200 sq ft × (4/12) ft = 66.67 cubic feet
• Cubic Yards: 66.67 / 27 = 2.47 cubic yards
• Estimated Weight: Approximately 3.46 tons (based on 1.4 tons per yard)

Common Gravel Coverage Weights

While different stones vary in density, these are the industry standards used in our calculations:

Material Type	Weight per Cubic Yard
Crushed Stone/Gravel	~2,800 lbs (1.4 tons)
Pea Gravel	~2,600 lbs (1.3 tons)
River Rock	~2,500 lbs (1.25 tons)

function toggleShapeInputs() { var shape = document.getElementById("shapeType").value; var rectDiv = document.getElementById("rectInputs"); var circDiv = document.getElementById("circInputs"); if (shape === "rectangular") { rectDiv.style.display = "block"; circDiv.style.display = "none"; } else { rectDiv.style.display = "none"; circDiv.style.display = "block"; } } function calculateGravel() { var shape = document.getElementById("shapeType").value; var depthInches = parseFloat(document.getElementById("depth").value) || 0; var wastePercent = parseFloat(document.getElementById("waste").value) || 0; var cubicFeet = 0; if (shape === "rectangular") { var l = parseFloat(document.getElementById("length").value) || 0; var w = parseFloat(document.getElementById("width").value) || 0; cubicFeet = l * w * (depthInches / 12); } else { var d = parseFloat(document.getElementById("diameter").value) || 0; var radius = d / 2; cubicFeet = Math.PI * Math.pow(radius, 2) * (depthInches / 12); } // Apply waste factor cubicFeet = cubicFeet * (1 + (wastePercent / 100)); var cubicYards = cubicFeet / 27; // Average gravel density: 1.4 tons per cubic yard var tons = cubicYards * 1.4; // Standard 50lb bags (approx 0.5 cubic feet per bag) var bags = cubicFeet / 0.5; if (cubicFeet > 0) { document.getElementById("resFeet").innerText = cubicFeet.toFixed(2); document.getElementById("resYards").innerText = cubicYards.toFixed(2); document.getElementById("resTons").innerText = tons.toFixed(2); document.getElementById("resBags").innerText = Math.ceil(bags); document.getElementById("gravelResults").style.display = "block"; } else { alert("Please enter valid dimensions to calculate."); } }