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Earthwork Cut and Fill Volume Calculator

Calculate separate cut and fill volumes from plan-area depth zones or ordered cross-sections, then estimate reusable material, loose import, loose export and volumetric vehicle loads.

Earthwork Cut and Fill Field Report

Entered geometry and project-specific conversion assumptions — SiteCalculators

Earthwork geometry

Choose the input method that matches the information available. Keep cut and fill separate.

No upload

Area-depth zones

Split the site into zones with representative plan area and average vertical cut or fill depth.

ZonePlan area (m²)Average cut (m)Average fill (m)NotesAction

Use 0 for cut or fill where it does not apply. A zone may contain both only if its average depths genuinely represent separate cut and fill portions.

Material state and movement assumptions

Replace every example with project or tested information. The factors are dimensionless and must use compatible material states.

loose ÷ bank
Example 1.25: 1 bank unit becomes 1.25 loose units.
loose ÷ compacted
Example 1.15: 1.15 loose units are required for 1 compacted unit.
%
m³ loose
Volumetric estimate only; check payload, legal limits and actual fill.
All entered geometry and calculations stay in this browser. CSV export creates a local file and does not upload project data.
Quantity limitation: This is an estimating aid from representative inputs. It does not replace survey surfaces, geotechnical assessment, material testing, a mass-haul model, approved formation information, specification checks or competent quantity verification.

Two ways to calculate cut and fill volume

Area × average depth is useful when a site has already been divided into representative cut and fill zones. For each zone, the plan area is multiplied by its average vertical cut depth and average vertical fill depth. The calculator totals the two material states independently.

bank cut volume = plan area × average cut depth
compacted fill volume = plan area × average fill depth

Average end area is useful when measured or designed cross-sectional areas are available along an alignment. For every interval, the calculator averages the start and end areas and multiplies by station spacing. Cut and fill areas are never netted within a section.

interval volume = spacing × (start area + end area) ÷ 2

The Federal Highway Administration earthwork design guidance describes the average-end-area method and the need to account for project-specific shrink and swell. This calculator exposes its conversion assumptions rather than hiding them in a preset.

Bank, loose and compacted volumes are different

The geometry result treats cut as bank or in-situ volume and fill as the required compacted volume. The bank-to-loose factor converts excavated cut into an estimated loose quantity. The loose-to-compacted factor estimates how much loose material is required to achieve the entered compacted fill volume.

The reusable percentage is applied to bank cut before conversion to loose volume. Reusable loose cut is matched against loose fill demand. Non-reusable cut remains an export quantity, so the report shows import and export separately even when both movements occur. A signed net movement is included only as a summary and should not replace the separate haul quantities.

Worked area-depth example

Zone A covers 1,200 m² with an average 0.35 m cut, giving 420 m³ bank cut. Zone B covers 900 m² with an average 0.25 m fill, giving 225 m³ compacted fill. With a 1.25 bank-to-loose swell factor, the cut becomes 525 m³ loose. At 80% reusability, 420 m³ loose is available for fill. A 1.15 loose-to-compacted factor requires 258.75 m³ loose fill, leaving 266.25 m³ loose export and no import. At 12 m³ per vehicle, that export is 23 rounded-up volumetric loads. The example button reproduces these values.

Choosing representative inputs

  • Use vertical differences between existing and design surfaces, not slope distance.
  • Split zones or add cross-sections wherever ground, formation or material changes materially.
  • Keep cross-section stations in strictly increasing order and use compatible area units.
  • Do not combine topsoil, unsuitable material, rock and acceptable fill under one reuse factor unless the project information supports it.
  • Check whether survey or modelling software uses grid, triangulated surface, average-end-area or another method before comparing totals.
  • Reconcile quantities with over-excavation, replacement, topsoil strip, drainage, structures and other items that are outside the entered geometry.

Vehicle loads and mass-haul limits

Load counts divide loose volume by the entered vehicle body capacity and round up any final part-load. They do not check mass, density, axle limits, bulking variability, loading efficiency, haul-route restrictions or legal payload. For detailed haul planning, separate movement by material type and use verified vehicle and material data.

Frequently asked questions

What is the average end area method?

It averages the cut or fill cross-sectional areas at two consecutive stations and multiplies that average by the station spacing. Separate cut and fill areas are totalled independently.

Are swell and compaction factors universal?

No. Earthwork conversion factors depend on material, moisture, excavation, placement and compaction requirements. Use project, geotechnical, test or supplier information rather than relying on the editable examples.

Does this calculator replace a survey surface model?

No. It is a transparent planning estimate from entered representative areas and depths. It does not model terrain between observations or certify quantities, formation levels, material suitability or mass-haul design.

Can import and export both be required?

Yes. Unsuitable cut may need export while selected fill is imported. The calculator reports import and export separately so a single net figure does not hide that movement.