Your result
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Enter your values, then click Calculate result.How this calculator helps
This excavation calculator connects a measured bank volume to loose hauling quantity and two independent truck limits. It does not assign a soil type a guessed swell factor or declare a payload legal. Swell, bank bulk density, usable truck volume and payload are supplied values. The result exposes which limit controls the simple uniform-material scenario, making it distinct from a rectangular-volume calculator or a density conversion alone.
How to use it
- 1
Measure compatible rectangular bank dimensions in metres.
- 2
Supply justified swell, bank bulk density and verified truck volume and payload limits.
- 3
Enter per-trip quote cost and click Calculate result.
- 4
Compare both trip bounds and conserved mass; verify loading and excavation procedures separately.
Formula and methodology
Bank volume = length × width × depth. Loose volume = bank volume × (1 + swell/100). Mass = bank volume × bank density. Trips = max[ceil(loose volume/truck volume), ceil(mass/truck payload)].
The calculator applies the displayed arithmetic to the values entered on this device. It does not silently load a local tax rate, currency conversion or commercial assumption.
Worked calculation example
A rectangular bank excavation 10 m long, 5 m wide and 2 m deep contains 100 m³. Supplied swell of 25% gives 125 m³ loose volume. At a bank density of 1,800 kg/m³, mass is 180,000 kg and loose density is 1,440 kg/m³. A truck with verified usable volume 10 m³ and payload 15,000 kg needs at least 13 trips by volume and 12 by payload. The combined trip requirement is 13. At 100 currency per complete trip, modeled haul cost is 1,300.
How to interpret your result
Read bank volume, loose volume and conserved mass before interpreting trips. The two rounded bounds reveal why the larger count controls. Loose density is a consistency output from the same supplied assumptions, not another measured input. The trip result is useful for a uniform-material planning scenario, while actual legal loading and excavation procedures remain separate assessments.
For different inputs or formulas, use Cubic Yard Calculator; Density Mass Volume Calculator; Construction Crew Size Calculator.
Related questions this calculator covers
- excavation haul calculator
- excavation swell calculator
- truck haul trips calculator
Scenario comparison
| Scenario | What it shows |
|---|---|
| Volume controls | the worked example needs thirteen trips by volume. |
| Payload controls | a heavier density can make the mass bound larger. |
| Zero swell | bank and loose volumes are equal in the stated model. |
Common mistakes to avoid
- Entering loose density as bank density while also applying swell.
- Ignoring payload because a truck has enough volume.
- Treating modeled trips as a safe-loading or excavation approval.
Recompute 10×5×2 = 100 m³ and multiply by 1.25 for loose volume. Check mass as 100×1,800 = 180,000 kg. Divide separately by ten cubic metres and fifteen thousand kilograms, round upward and compare thirteen with twelve. Multiply inferred loose density by loose volume to recover the same mass. Review actual capacities and quote scope independently before planning transport.
Authoritative reference. Reviewed on 6 October 2026 for the specific disclosed method or measurement context. The arithmetic is independently implemented. A linked reference does not certify an individual result or extend the worksheet beyond its stated scope.What can affect the result?
Bank dimensions describe in-place volume
Length, width and depth are in metres and describe a rectangular in-place excavation under this worksheet. Irregular profiles, batters, benches or sloped surfaces need an independently assessed equivalent bank volume rather than an arbitrary bounding box. A rectangular volume is a geometric assumption, not a site survey. Use compatible measurements and avoid mixing feet with metres. The calculator does not choose an excavation depth or establish that digging is safe.
Swell changes volume without adding mass
Swell represents the increase in bulk volume after excavation under the supplied material condition. A twenty-five-percent increase turns one hundred bank cubic metres into one hundred twenty-five loose cubic metres. The worksheet conserves material mass through that change, so loose bulk density decreases correspondingly. Water changes, added material, segregation or losses can violate that simple conservation scenario. Use measured or justified factors that describe the intended material and handling condition.
Bank density belongs to the original volume
The entered density is the bank bulk density in kilograms per cubic metre. Multiplying it by bank volume gives modeled mass. A loose-density record cannot be substituted unchanged as bank density when swell is also applied. The output shows inferred loose density as bank density divided by the swell multiplier, providing an internal check. Bulk density differs from particle density because voids are part of the bulk volume.
Truck volume and payload are separate limits
Usable loose-material volume can limit a load before its mass reaches the payload limit. Dense material can reach payload capacity before the body is full. Enter both independently verified capacities for the actual vehicle and route. Nameplate volume or a quoted capacity may not describe the usable fill convention or legal operation. The calculator does not calculate axle distribution, gross vehicle weight, road restrictions or loading stability.
Two rounded lower bounds determine trips
Divide loose volume by usable volume and round upward to obtain a volume trip bound. Divide total mass by payload and round upward to obtain a mass bound. The larger of the two bounds is the modeled complete-trip count for uniform divisible material. This assumes material can be apportioned compatibly among trips. Mixed loads, indivisible items, varying truck capacities or minimum-load rules require a more detailed loading plan.
Cost follows complete trips only
The cost input is a supplied amount per complete trip on the same quotation basis. Multiplying by the modeled trip count gives that simple haul charge. Loading time, waiting, travel duration, disposal fees, taxes and mobilization are not inferred. Include them in the supplied per-trip amount only if that is how the quotation is structured, or account for them separately. A positive-volume calculation cannot establish that a fixed per-trip rate covers every project condition.
Haul planning is not excavation approval
The worksheet does not locate utilities, assess ground stability, design a trench, choose protective systems or authorize removal. Those tasks require site-specific information and applicable professional procedures. Its purpose is quantity and capacity arithmetic using existing measurements and verified limits. A controlling volume or payload result is not a safe-loading certificate. Keep the material basis, source of capacities and actual quotation with the computed trip scenario.
Privacy and browser processing
Values entered on this page are processed in the current browser session. SolvePilot does not require an account and does not receive the values entered into the calculator. Refreshing or closing the page clears the working values unless the browser itself restores a previous session. Avoid entering identifying or account information because the calculation needs summary values only.
Accuracy and verification
Accuracy depends first on input quality. Confirm definitions, scales, dates and source information before entering a value. Keep an independent record of any result used for planning because this page does not create an official statement or retain a calculation history.
Limits of this estimate
Entering loose density as bank density while also applying swell. Read bank volume, loose volume and conserved mass before interpreting trips. The two rounded bounds reveal why the larger count controls. Loose density is a consistency output from the same supplied assumptions, not another measured input. The trip result is useful for a uniform-material planning scenario, while actual legal loading and excavation procedures remain separate assessments. Entries remain on this device for the calculation and are not submitted to a calculation server. Browser floating-point arithmetic and displayed rounding do not establish real-world measurement certainty.
Sources and review information
Frequently asked questions
Does swell increase material mass?＋
Not in this disclosed model; it increases bulk volume while mass is conserved.
Which density should I enter?＋
The bank bulk density associated with the original in-place volume.
Why calculate two trip bounds?＋
Usable truck volume and payload mass can each control the number of trips.
Will it find legal truck capacity?＋
No. Supply independently verified usable volume and payload limits.
Does the cost include disposal and waiting?＋
Only if already represented in the supplied per-trip quote; no additional fees are inferred.