Gravel Calculator
Reviewed by Engr. Talha Tariq | PEC License #: PEC-CIVIL-37815 | Last updated: 2025-10-25
Estimate how much gravel you need based on your project dimensions and desired depth. This free gravel calculator quickly converts your measurements into cubic yards, tons, and provides an estimated cost. Supports rectangular, circular, and triangular areas with custom gravel density inputs.
Estimate how much gravel is needed based on your project dimensions and selected depth.
Use this calculator to find the required gravel in tons or cubic yards. Just enter the dimensions of your project area.
Step 1 — Shape & Units
Step 2 — Dimensions
in ft
in ft
Project depth
Step 3 — Material & Cost
Extra material for spillage
Optional
How to Calculate Gravel Quantity & Cost
Whether you are building a new driveway, laying a decorative mulch bed, or setting up a French drain, figuring out exactly how much gravel you need can be tricky. This calculator converts the dimensions of your project area into precise cubic yards and tons based on industry density standards.
Key Features
Volume Estimation
Calculates gravel volume in cubic feet, cubic yards, and cubic meters.
Weight Conversion
Converts estimated gravel quantity into pounds, tons, and kilograms.
Density-Based Results
Uses gravel type or custom density for more realistic estimates.
Cost Estimation
Calculates total material cost from tons or cubic yards pricing.
Waste Factor Support
Adds extra material for installation waste and uneven coverage.
Multiple Shapes
Supports rectangular and optional circular or triangular project layouts.
US and Metric Units
Works with common American and metric measurement systems.
How to Use This Calculator
- 1Select your Project Shape (Rectangle, Circle, or Triangle) and Dimension Unit.
- 2Enter the Dimensions (Length and Width, or Radius, etc.) and Depth of your project area.
- 3Choose a Gravel Type for an approximate density, or select Custom Density.
- 4Enter a Waste Factor (usually 5% to 15%) to account for spills, settling, or uneven ground.
- 5(Optional) Enter the Price per Ton or Cubic Yard to calculate estimated material costs.
- 6Click Calculate to see the total volume, weight in tons and pounds, and total cost.
Formula
- 1) Area CalculationRectangle: Area = Length × Width
Circle: Area = π × Radius²
Triangle: Area = (Base × Height) / 2 - 2) Volume & ConversionsVolume (cubic feet) = Area (sq ft) × Depth (ft)
Volume (cubic yards) = Volume (cubic feet) ÷ 27 - 3) Weight EstimationWeight (lbs) = Volume (cubic feet) × Density (lb/ft³)
Weight (tons) = Weight (lbs) ÷ 2000 - 4) Waste Factor AdjustmentAdjusted Quantity = Base Quantity × (1 + Waste Percentage / 100)
Gravel Density and Weight Assumptions
Because gravel types, size, and moisture content vary, the weight of gravel per cubic yard can also fluctuate. This calculator uses typical density values to estimate weight:
- General Gravel: ~105 lb/ft³
- Pea Gravel: ~100 lb/ft³
- Crushed Stone: ~105 lb/ft³
* Note: Actual density varies by stone type, moisture, and compaction. If you know the exact density from your supplier, select "Custom Density" to input it directly.
Frequently Asked Questions
How do I calculate how much gravel I need?
Measure the length, width, and desired depth of your project. Multiply length by width to get the area, then multiply by the depth to get the volume. Use our Gravel Calculator to easily convert this into cubic yards and tons based on proper density.
How many cubic yards of gravel do I need?
Once you know your volume in cubic feet, divide it by 27 to get cubic yards. A project area of 10 ft by 10 ft with a 3-inch depth needs approximately 0.93 cubic yards.
How many tons of gravel do I need?
A cubic yard of typical gravel weighs about 1.4 to 1.5 tons (2,800 to 3,000 lbs). You calculate the tons needed by taking your cubic foot volume, multiplying it by the material's density (e.g., 105 lbs/ft³), and dividing by 2000.
How deep should gravel be for landscaping?
For most landscape beds and decorative coverage, a depth of 2 to 3 inches is recommended to prevent weed growth and provide solid coverage.
Does gravel weight vary by type?
Yes. Smaller, smoother stones like pea gravel pack differently than angular crushed stone. Additionally, damp gravel will weigh more than dry gravel.
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