Cut-and-fill balancing starts with separate geometric cut and fill volumes. A site is not balanced simply because bank excavation equals compacted embankment: shrink, swell, unsuitable material, topsoil, and off-site import or export can change the usable balance.
Calculate cut and fill as separate geometric volumes, then convert each material with project-specific shrink or swell factors before judging site balance. Equal bank cut and compacted fill numbers do not automatically mean the site is balanced.
Published: September 29, 2026
Last reviewed: September 29, 2026
Published by BuildYard. The guide reflects BuildYard's calculation methodology and editorial standards and does not replace project-specific professional advice.
For cross-section work, the average end-area method uses the average of adjacent cross-sectional areas multiplied by the distance between them.
Keep cut and fill as separate quantities at each interval before summing the project totals.
Convert cubic feet to cubic yards by dividing by 27 after the geometric volume is calculated.
Do not mix bank, loose, and compacted volumes in one total without labeling the basis.
Shrink and swell factors should come from geotechnical or project data for the actual soil or rock.
A geometric cut volume does not automatically equal the compacted fill volume available from that material.
Compare usable adjusted cut with fill demand, then identify import, export, waste, or stockpile quantities.
Keep topsoil, unsuitable material, and special excavation as separate lines when the project treats them differently.
Calculate stripped topsoil volume from measured area and specified removal depth, then plan separate stockpile, reuse, or export quantities.
Read guide →Excavation & EarthworkEstimate foundation excavation, working-space excavation, reusable backfill, and haul-off volume from footing, wall, and basement geometry.
Read guide →Excavation & EarthworkCalculate trench excavation volume, loose spoil planning quantity, and haul-off needs from trench geometry while keeping safety slopes and protective systems project-specific.
Read guide →Average-end-area example for one interval before shrink/swell or material-suitability adjustments.
| Step | Calculation | Result |
|---|---|---|
| Average cut area | (120+180)÷2 | 150 sq ft |
| Interval volume | 150×50 | 7,500 cu ft |
| Cubic yards | 7,500÷27 | 277.8 yd³ |
| Site balance | Apply project factors | Adjusted separately |
Current manufacturer data, supplier specifications, drawings, field measurements, applicable codes, permit requirements, and qualified professional guidance can take priority over a general-purpose planning estimate.