Soil Compaction and Shrinkage
On this page
Loose, bank, and compacted soil volumes are different. Use a project-specific swell, shrinkage, or compaction factor and state which volume condition the calculator result represents.
Why this edge case matters
This case needs an explicit result state because ordinary arithmetic can become undefined or misleading at the boundary.
A plausible-looking number can still be undefined, misleading, or based on the wrong denominator. The page should name the failure condition instead of silently forcing a result.
Calculation sequence
Rectangular prism V=L x W x D. Cylinder V=πr²D. Triangular prism V=b x h/2 x D. For irregular excavation, split the footprint into sections or use average depth only when measurements support it.
Worked boundary example
For a rectangular area measured in feet, cubic yards = length x width x depth in feet / 27. A 10 ft x 12 ft area that is 6 in deep uses 10 x 12 x 0.5 / 27 = 2.22 cubic yards before any project-specific allowance.
Reporting the result
Show the raw inputs, substituted calculation, unrounded result, displayed result, and any warning. When the calculation is undefined, return a clear explanation and a safer alternative such as absolute change.
Excavation swell, settlement, compaction, uneven subgrade, spillage and supplier minimums affect delivered quantity. Concrete waste, soil shrinkage and gravel compaction are different processes; do not apply one universal factor to every material.
Common mistakes
- Using inconsistent units before applying the calculation.
- Rounding intermediate values and carrying that error into the final result.
- Treating an estimate, reference chart, or general rule as an official or professional decision.
- Using the Cubic Yard Calculator without checking whether its stated method matches the user's situation.
Use the result
Open the Cubic Yard Calculator to run the calculation with displayed inputs and method details. Then use this guide to check the interpretation, boundary, or next decision. Keep the source measurements and unrounded result when the value will be reused.
Frequently asked questions
What does Soil Compaction and Shrinkage mean in practice?
Loose, bank, and compacted soil volumes are different. Use a project-specific swell, shrinkage, or compaction factor and state which volume condition the calculator result represents.
How does this page relate to the Cubic Yard Calculator?
The calculator performs the numeric operation. This guide covers ordering, explains the assumptions, and shows the checks needed before the result is used.
Should intermediate values be rounded?
Keep working precision through unit conversion and intermediate steps unless the controlling rule requires a specific intermediate rounding sequence. Round the displayed result once and state the rule.
What is the main limitation?
Excavation swell, settlement, compaction, uneven subgrade, spillage and supplier minimums affect delivered quantity. Concrete waste, soil shrinkage and gravel compaction are different processes; do not apply one universal factor to every material.
Sources
- https://www.nist.gov/pml/special-publication-811
- https://www.nrcs.usda.gov/resources/guides-and-instructions/engineering
Prepared for CalculatorGeek on September 9, 2026. Confirm the source is still current at publication. Do not display a reviewed-by or last-reviewed claim until the review is actually completed and recorded.
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