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Fill Dirt Cost Calculator

Calculate fill dirt project costs for foundation backfilling, landscaping, and site grading. Enter volume or area to get material quantity and detailed cost estimate including delivery and placement. Enter dimensions, select units and add waste to get instant, supplier-ready numbers.

1. Measurements & Dimensions

2. Material Properties & Waste Allowance

3. Optional Material Cost

FILL DIRT COST CALCULATOR ESTIMATE
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Enter dimensions above to calculate

Calculation Breakdown & StepsFormula: Volume = length × width × depth × sections; order volume = volume × (1 + allowance / 100); weight = order volume × density.
  1. Enter values to see step-by-step substitution.

    Engineering Assumptions:

    • Depth and density must describe the same state: loose delivered material or the finished compacted layer.
    • Density varies with grading, moisture and compaction. A supplier quote is more reliable than a generic default. Short tons are 2,000 lb.
    VISUAL GUIDE — FILL DIRT COST CALCULATORgravel · fill-dirt-cost-calculator

    TOP VIEW — Length × Width

    Fill Dirt Cost Calculator topLength 18ftWidthFill Dirt Cost18×13 = 234 ft²

    SECTION — Placed thickness 3in

    Fill Dirt Cost Calculator sectionFill Dirt Cost 3in3"Volume = length × width × depth × sections; order volume = volume × (1 + allowance / 100); weight = order volume × density. · +5% → 2.28 yd³
    Fill Dirt Cost Calculator — Volume = length × width × depth × sections; order volume = volume × (1 + allowance / 100); weight = order volume × density. · example 18×13 @3in = 58.5 ft³ (2.17 yd³) → 2.28 yd³ with 5% waste · fill-dirt-cost-calculator

    What Is This Calculator?

    The Fill Dirt Cost Calculator — Sizes gravel and aggregate for driveways and patios — volume, weight and cost with density.

    What Does It Calculate?

    • Cubic yards and cubic feet
    • Tons and pounds using 1.35–1.60 t/yd³
    • Cost per ton or per yard with waste

    How to Use the Calculator

    1. Measure Fill Dirt Cost 20 ft x 10 ft x 4 in — use feet for length/width and inches for thickness where typical.
    2. Enter values and select units. The calculator converts to feet before calculating (inches /12, yards x3).
    3. Adjust waste % and optional price, then click Calculate. Results show with waste included.
    4. Use Reset to clear and try another size.

    Formula & Engineering Methodology

    Volume = length × width × depth × sections; order volume = volume × (1 + allowance / 100); weight = order volume × density.

    • L — Length for Fill Dirt Cost in feet
    • W — Width for Fill Dirt Cost in feet
    • D — Depth for Fill Dirt Cost in feet

    All units convert to exact standard engineering dimensions (NIST SP 811) before calculation to ensure consistency between US Customary and Metric measurements.

    Worked Example

    Example: Fill Dirt Cost 20 ft x 10 ft x 4 in

    STEPVALUE
    Convert depth4 in /12 = 0.333 ft
    Cubic feet20 x 10 x 0.333 = 66.67 ft3
    Cubic yards66.67 /27 = 2.47 yd3
    With 10% waste2.72 yd3

    Construction Information

    Material: Pea gravel 1.35 t/yd³, crushed stone 1.40, river rock 1.33, limestone 1.60, sand 1.30. Confirm with scale ticket — moisture adds 10%.

    • Measure longest x widest; split L-shapes into two rectangles and add.
    • Compact subgrade — soft spots add thickness.
    • For structural sizing (beams, headers, rebar) verify with a professional per local code.

    Material Information

    Pea gravel 1.35 t/yd³, crushed stone 1.40, river rock 1.33, limestone 1.60, sand 1.30. Confirm with scale ticket — moisture adds 10%.

    Waste & Overages

    Open-graded stone settles ~8% (×1.10), crusher run compacts 15–25% (×1.20). Add after volume.

    Practical Tips

    • Use fabric under decorative gravel
    • Crown driveway center 2% for drainage

    Common Mistakes

    • Mixing tons and yards without density
    • Not adding compaction for crusher run

    Assumptions & Engineering References

    • Depth and density must describe the same state: loose delivered material or the finished compacted layer.
    • Density varies with grading, moisture and compaction. A supplier quote is more reliable than a generic default. Short tons are 2,000 lb.

    This calculator provides an estimate based on your inputs. Actual requirements vary by site, material and installation. For code-regulated or load-bearing work, consult a qualified professional.

    Calculations run 100% in your browser — zero tracking of your dimensions or input data.

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    Frequently asked questions

    What does the Fill Dirt Cost Calculator calculate?

    The Fill Dirt Cost Calculator estimates fill dirt cost quantity for US jobs — Cubic yards and cubic feet, Tons and pounds using 1.35–1.60 t/yd³, Cost per ton or per yard with waste. Enter dimensions, choose units, add waste and price to get instant results.

    How do I measure for fill dirt cost?

    Measure fill dirt cost 20 ft x 10 ft x 4 in on site. Use the unit selectors — the tool converts inches→feet (÷12) and yards→feet (×3) before math. For non-rectangular, split into rectangles and add.

    How much waste should I add?

    Open-graded stone settles ~8% (×1.10), crusher run compacts 15–25% (×1.20). Add after volume.

    How accurate is this fill dirt cost estimate?

    Math is exact for your inputs. Actual needs vary by site, material and installation. Add 5–10% waste for rectangular, 10–15% for irregular.

    About Calculator Street

    Built by Vipul Otari for US homeowners & contractors. Calculator inputs are processed in your browser. Estimates depend on your measurements, product specifications and the assumptions shown on this page. Confirm order quantities with your supplier and structural requirements with your project designer. Page updated: 2026-09-11.

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