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Soil Weight Calculator

Calculate soil weight — volume to pounds and tons with density. For ordering and truck loads. Enter excavation dimensions to get instant results. 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

SOIL WEIGHT CALCULATOR ESTIMATE
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Enter dimensions above to calculate

Calculation Breakdown & StepsFormula: Mass = volume × density; US tons = pounds / 2,000; kilograms = pounds × 0.45359237.
  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 — SOIL WEIGHT CALCULATORexcavation · soil-weight-calculator

    TOP VIEW — Volume × Material density

    Soil Weight Calculator topVolume 13yd3Material densitySoil Weight13×8 = 104 yd3²

    SECTION — Material allowance 8%

    Soil Weight Calculator sectionSoil Weight 8%8"Mass = volume × density; US tons = pounds / 2,000; kilograms = pounds × 0.45359237. · +12% → 2.88 yd³
    Soil Weight Calculator — Mass = volume × density; US tons = pounds / 2,000; kilograms = pounds × 0.45359237. · example 13×8 @8% = 69.3 ft³ (2.57 yd³) → 2.88 yd³ with 12% waste · soil-weight-calculator

    What Is This Calculator?

    The Soil Weight Calculator — Volumes earthwork for US trenches and grading — cut, fill, backfill and soil weight.

    What Does It Calculate?

    • Trench volume in cubic yards
    • Backfill less pipe volume
    • Soil weight in tons with swell

    How to Use the Calculator

    1. Measure Soil Weight 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

    Mass = volume × density; US tons = pounds / 2,000; kilograms = pounds × 0.45359237.

    • L — Length for Soil Weight in feet
    • W — Width for Soil Weight in feet
    • D — Depth for Soil Weight 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: Soil Weight 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: Soil swells 15–25% when dug (1.2x). Clay 1.6 t/yd3, sand 1.5, topsoil 1.2. Call 811 before dig.

    • 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

    Soil swells 15–25% when dug (1.2x). Clay 1.6 t/yd3, sand 1.5, topsoil 1.2. Call 811 before dig.

    Waste & Overages

    Trench sides slough — add 10% for over-excavation. Shrinkage 10% on backfill.

    Practical Tips

    • Bench or slope sides per OSHA over 5 ft
    • Stockpile topsoil separate from subsoil

    Common Mistakes

    • Forgetting swell — truck count short
    • Not subtracting pipe volume for backfill

    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 Soil Weight Calculator calculate?

    The Soil Weight Calculator estimates soil weight quantity for US jobs — Trench volume in cubic yards, Backfill less pipe volume, Soil weight in tons with swell. Enter dimensions, choose units, add waste and price to get instant results.

    How do I measure for soil weight?

    Measure soil weight 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?

    Trench sides slough — add 10% for over-excavation. Shrinkage 10% on backfill.

    How accurate is this soil weight 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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