AtlasCalcsUtility Calculation Suite
2026-09-23 8 min read

Soil Stockpile Calculator

Free soil stockpile calculator — calculate stockpile volume, weight and truckloads from cone measurements. Includes live results, step-by-step working, charts, material takeoff and cost estimates. No sign-up.

Calculator

Pile diameter(ft) Help
ft

Base width

Pile height(ft) Help
ft

Peak height

Repose angle(°) Help
°

Cross-check, ~35°

Soil type

Stockpile plan

ItemAmount
StockpileLoose yards69.81 cu yd
WeightAt soil density94.2 tons
TruckloadsTo move it5.0
FootprintGround covered706.9 sq ft

How to use this result

  • Primary result: 69.81 cu yd — verify it against a rough hand check before ordering.
  • Read the steps section to see every conversion and the exact formula path.
  • Use the breakdown table on the left as your order or bid checklist.
  • Re-run with worst-case dimensions so the plan covers the whole job.

Results

Normal

Stockpile volume

69.81cu yd

Loose yards in the pile

Weight

94.2tons

At soil density

Truckloads

5.0loads

At 14 cu yd each

Footprint

706.9sq ft

Ground covered

Live results update as you type — currently showing 69.81 cu yd. Replace the defaults with your own measurements for exact results.

Visualizations

Pile vs truck (cu yd)

69.8Pile
14Truck (14)

Pile vs one truck

Pile83%
Truck17%

Formula

Stockpile volume is the cone formula with an angle-of-repose sanity check.

V = π × r² × H ÷ 3

Variables

SymbolNameUnitDescription
r, HRadius, heightftCone dimensions.
VVolumecu ydLoose yards.
reposeAngle°Natural cone angle.

Explanation

Cone volume at full precision divided by 27; density weights it; repose geometry validates shape.

Step-by-Step Calculation

Follow each step to understand how the result is calculated from your inputs.

Step 1

Cone volume from base and height.

π × 15.00² × 8 ÷ 3
Result: 1,885.0 cu ft = 69.81 cu yd
Step 2

Weight at the soil density.

69.81 × 2,700 ÷ 2000
Result: 94.2 tons
Final Answer
69.81

Worked Examples

See how the calculator works with different scenarios.

Scenario

The calculation run on the values above, showing the full path rather than only the answer.

Inputs

Result:69.81 cu yd

Calculation

1. Cone volume from base and height. → 1,885.0 cu ft = 69.81 cu yd 2. Weight at the soil density. → 94.2 tons

Result

69.81 cu yd

Interpretation

Probe every pad and trench, separate topsoil from spoil, and book trucks to the loose volume — not the bank figure.

Understanding Your Result

Your Result: Stockpile volume: 69.81 cu yd

Typical range: Pickup ~2 cu yd · dump truck 10–16 loose cu yd · trench 1 ft × 100 ft × 4 ft ≈ 15 bank cu yd.

What This Means

Your result is 69.81 cu yd — the bank and loose volumes, truckloads and cost for your stockpile

Why It Matters

Earthwork is the first money spent and the easiest to misjudge: swell multiplies spoil, haul distances multiply cost, and rock stops everything. Quantities first keeps the site moving.

Professional Interpretation

Probe every pad and trench, separate topsoil from spoil, and book trucks to the loose volume — not the bank figure.

How this is calculated

Volume is π × radius² × height ÷ 3. Soil factors apply last; trucks round up.

What drives the result

The inputs in a single consistent unit and the allowance or price you apply.

Recommendations

  • •Verify critical dimensions on site before ordering.
  • •Keep one unit throughout each calculation.
  • •Add the trade allowance before buying, not after.
  • •Attach the step-by-step working to bids and records.

Educational Content

Introduction

Earthwork quantity is geometry with soil factors: bank volume from dimensions, loose with swell, compacted with shrinkage, trucks from payload.

Concept Explanation

Volume is π × radius² × height ÷ 3. Soil factors apply last; trucks round up.

Applications

▸Pad, trench and basement takeoffs
▸Cut, fill and balance planning
▸Haul truck scheduling and spoil piles
▸Topsoil, base and bedding quantities
▸Grading and compaction estimates

Benefits

  • •Bank, loose and compacted figures together
  • •Swell and compaction factors built in
  • •Truckloads rounded up for scheduling
  • •Free, no sign-up, works on site from a phone

Limitations

  • •Two-dimensional math unless stated otherwise — slopes and curves need the right tool
  • •Results are only as good as the site measurements
  • •Allowances and prices are estimates — confirm with local quotes

Best Practices

  • •Measure twice and write measurements down before typing them in
  • •Keep one unit throughout each calculation
  • •Photograph the tape on large or disputed measurements
  • •Re-run with worst-case numbers so the plan covers the whole job

Common Misconceptions

Myth: The calculator replaces site verification.
Truth: It replaces the arithmetic, not the tape measure — always verify before ordering.
Myth: One decimal place is always enough.
Truth: On long runs, rounding early compounds. Enter full measurements and let the tool round at the end.
Myth: Metric and imperial give different answers.
Truth: They are the same physical quantity in different units — conversion is exact.

Practical Tips

  • •Enter full measurements and let the tool round at the end.
  • •Use the steps section to double-check the formula path.
  • •Save or share the result link with the crew and the supplier.
  • •Re-run with worst-case dimensions for a safe order.

Common Mistakes

Rounding measurements before calculating.
Enter the full tape reading; rounding early compounds across a job.
Mixing units between fields.
Pick one unit in the dropdown so every conversion is consistent.
Forgetting to verify on site.
Plans differ from as-built work — confirm critical dimensions.
Ordering the bare result with no allowance.
Add the trade waste or contingency factor before buying.

Assumptions

This calculator makes the following assumptions to provide estimates:

Consistent units: All inputs share the selected unit system.
Standard geometry: Flat-plane Euclidean formulas unless stated.
Full precision: Rounding happens only on display, never mid-calculation.

Limitations

Be aware of these limitations when using this calculator:

Estimates, not quotes: Allowances and unit prices vary by region — get 2–3 local quotes.
Verify on site: Confirm critical dimensions before ordering or cutting.

Frequently Asked Questions

Answers to common questions about this calculator.

How do I measure a stockpile?
Cone volume: π × radius² × height ÷ 3. Measure the base diameter and the peak height; windrow piles use the prism formula instead.
Why check the angle of repose?
Loose soil cones at its natural angle (~35°). A pile far steeper or flatter signals a bad measurement — the calculator cross-checks.
Bank vs loose yards — what is the difference?
Bank yards are in-place; loose yards are after digging, swollen 20–35%. Trucks and spoil piles are loose; pay quantities are usually bank.
How accurate is this calculator?
Exact for the dimensions entered. Probe depths and check soil type — subgrade variation and rock move real quantities.
What does the cost estimate include?
Dig, haul or fill at your unit rates on the computed quantities. Rock, dewatering, shoring and testing price separately.
When do I need shoring or sloping?
OSHA requires protection at 5 ft depth and deeper (4 ft in some states). Plan the system before the excavator arrives.
How do I balance cut and fill?
Shrink the cut (divide by ~1.15) to compacted yield, subtract the fill: positive exports, negative imports. Balanced sites haul the least.
What is shrinkage vs swell?
Swell grows dug soil (bank to loose); shrinkage compacts it back smaller than bank (cut to compacted fill). Both move money in opposite directions.
How do I estimate grading production?
Dozers move 50–150+ bank yards/hour by push distance and soil; excavators 30–80. Use fleet history, never brochure peaks.
What slope ratio is stable for fills?
2:1 horizontal-to-vertical or flatter for most unreinforced fills; steeper needs walls, geogrids and drainage design. Water, not angle, usually fails slopes.
How do I set grade stakes?
Hubs with cut/fill marks to finish elevation, guarded and offset from traffic. Stake finish, not cuts — crews build to the lath.
How much does fill shrink when compacted?
About 10–20% (15% typical): 100 loose yards yield roughly 87 placed. Order loose to the placed need.
How many lifts does an embankment need?
Height divided by 8–12 in lift depth, each compacted and tested. Thick dumped lifts never compact through, however long you roll.
What is optimum moisture for compaction?
The water content giving maximum density for that soil — dry of it will not compact, wet of it pumps. Field techs test it; crews feel it with experience.
How much clearing debris per acre?
Roughly 20 loose yards for light brush, 40 medium, 80+ heavy timber — plus stumps. Chip, burn where allowed, or haul.
What permits does earthwork need?
Grading, erosion control, tree, wetland and haul-route permits vary by jurisdiction. Fines exceed the dirt cost — check before the first push.
How do I control erosion during earthwork?
Silt fence, stabilized entrances, staged clearing and quick stabilization. Inspect after every rain — regulators do.
What if my site conditions differ from the page defaults?
Defaults are worked examples, not recommendations — replace every input with your own measurements, prices and allowances before ordering or bidding.
How do I budget for price changes mid-project?
Lock supplier quotes in writing with expiry dates, carry a 5–10% escalation contingency, and re-run the calculator when prices move. Volatile materials get shorter quote windows.
Should I buy materials in bulk for this job?
Bulk wins when storage is dry and secure, the material keeps, and the discount beats carrying cost. Otherwise phased delivery avoids damage, theft and cash lockup.
How do I document quantities for change orders?
Record before-and-after measurements with dated photos, keep delivery tickets, and re-run the calculator for the changed scope. Paper trails get paid; memories do not.
What inspections relate to the soil stockpile calculator?
Anything structural, concealed or regulated gets inspected before covering: footings, steel, drains, waterproofing and rough-ins. Book inspections before the work that buries them.
How do I measure correctly for the soil stockpile calculator?
Measure twice with a tape or laser, write every reading down before typing it in, and keep one unit throughout. Photos of the tape protect you on disputed dimensions.
What units does the soil stockpile calculator use?
Whatever unit you select — pick one and use it for every field so conversions stay consistent. Results convert to the common trade units automatically.
How accurate is the soil stockpile calculator?
Exact for the numbers entered: all math runs at full precision and rounds only for display. Field accuracy depends on your measurements, so verify critical dimensions on site.
Can I use the soil stockpile calculator for bids and quotes?
Yes — the steps section shows the full working, and the breakdown table lists order quantities. Attach both to bids so clients see net figures and allowances separately.
Should I add waste or contingency to the result?
Yes. Add the trade waste factor (5–20% depending on material) before ordering, and carry a separate 5–10% budget contingency for price movement and surprises.
Why is my result different from my supplier quote?
Quotes include delivery, minimums, pack-size rounding, tax and regional pricing on top of bare quantities. Compare the net quantities first, then the add-ons.
Do I need a professional for this work?
Measuring and budgeting you can do yourself with this tool. Structural design, permits, licensed trades and inspections still need qualified professionals.
How do I convert the result to other units?
Use the results dashboard conversions, or the dedicated conversion calculators for length, area, volume and weight. Convert each linear dimension before combining into areas or volumes.

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Related Guides

Deepen your understanding with these educational resources.

Glossary

Technical terms used in mortgage calculations explained in plain language.

Bank cubic yard
One cubic yard of undisturbed in-place material.
Loose cubic yard
Excavated material after swell — typically 20–35% more than bank.
Swell
Volume growth when soil is dug (20–35% for most soils, up to 50%+ for rock).
Compaction
Mechanical densification of placed fill, usually in 8–12 in lifts.
Cut / fill
Ground removed (cut) or placed (fill) to reach design grade.
Spoil
Excavated material not reused as fill.
cu yd
The primary unit reported by this calculator.

Authoritative References

Trusted sources and standards referenced by this calculator.

Applicable Standards

OSHA: sloping, benching or shoring for trenches 5 ft and deeperSwell 20–35% for soils (bank → loose); compaction ~15% (loose → compacted)Haul trucks typically 10–16 cu yd loose per loadCall utility locators before any digging

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Page Information

Last Updated:

2026-09-23

Version:

2.0.0

License:

Free to use for educational and professional purposes.