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Earthwork Calculator

Earthwork Calculator estimates earth cut volume, swell, tons, and hauling for early grading and sitework quantity checks. Enter job dimensions in U.S. customary units, adjust supplier assumptions, and get purchase-ready quantities instantly.

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HOW IT WORKS

Formula and assumptions

Calculate bank cut and loose haul volume; cut-and-fill mode first normalizes reusable cut to compacted fill using shrink before balancing.

Average dimensions approximate the excavation as a rectangular prism.
Swell and density are editable estimates.

FIELD CHECK

Before you order

This average-depth method is appropriate for rough planning; grid, cross-section, or surface models are needed for detailed civil quantities.

Worked example

Example: with excavation length 100 ft, excavation width 60 ft, average cut depth 2 ft, matching sections 1, the earthwork calculator returns 533.33 cu yd for excavated volume. The supporting check is truck loads: 45 loads. Replace the prefilled measurements and supplier assumptions with the project values before ordering.

PROJECT GUIDE

Using this calculator well

WHEN TO USE IT

Best use of this calculator

Use the result as a planning estimate, then verify field measurements and product-specific data before ordering or building.

INPUTS EXPLAINED

What each input means

Excavation length: Enter the measured value and choose the matching unit (ft, in, yd, m, cm).
Excavation width: Enter the measured value and choose the matching unit (ft, in, yd, m, cm).
Average cut depth: Enter the measured value and choose the matching unit (ft, in, yd, m, cm).
Matching sections: Enter the project value used by the calculation.
Swell factor: Enter the project value in %.
Truck capacity: Enter the project value in cu yd.
Loose soil density: Enter the project value in lb/cu ft.
Excavation / disposal per cubic yard: Enter the project value in $.

COMMON MISTAKES

Checks that prevent bad estimates

Mixing units or entering a measurement in a different unit than the selected field unit.
Using a planning default when the exact manufacturer or supplier specification is available.
Rounding intermediate measurements too early instead of rounding the final purchase quantity.
Ignoring waste, compaction, cuts, laps, settlement, or full-package rounding where the project requires them.

SOURCES & REVIEW

How this estimate is supported

The implemented formula, assumptions, and worked example on this page are the calculator-specific reference. BuildYard's broader rules are documented in the Calculation Methodology and Sources & References.

For material density, coverage, yield, dimensions, package quantity, price, and other product-specific values, the current manufacturer or supplier specification should override a planning default.

Last reviewed: September 15, 2026, as part of the site-wide calculator workflow validation pass. See the BuildYard Changelog.

LEARN THE METHOD

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COMMON QUESTIONS

Earthwork Calculator FAQ

What does the Earthwork Calculator calculate?

It converts the measurements for early grading and sitework quantity checks into the buying units normally used for earth cut volume, swell, tons, and hauling, with the relevant waste, package, weight, or cost outputs shown on the result card.

How accurate is this earthwork calculator?

The geometry is calculated from the values you enter. Final ordering accuracy still depends on field measurements, supplier density or coverage, product dimensions, compaction, cuts, and the selected allowance.

What should I verify for early grading and sitework quantity checks?

This average-depth method is appropriate for rough planning; grid, cross-section, or surface models are needed for detailed civil quantities. Confirm the selected product, field conditions, and purchasing increments before placing the order.

Should I round the result up?

Yes for indivisible buying units such as bags, sheets, bundles, pallets, boxes, bars, and truck loads. The calculator rounds those purchase quantities up automatically.

KEEP ESTIMATING

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