Soil swell and shrink balance calculator

Calculate loose excavated volume and potential compacted volume with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use loose excavated volume and potential compacted volume to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Bank excavation volume (m³)
100
Loose/bank volume ratio
1.25
Compacted/bank volume ratio
0.9
Required compacted fill (m³)
70
Loose excavated volume (m³)
125
Potential compacted volume (m³)
90
Surplus compacted-equivalent volume (m³)
20
Loose surplus requiring disposal (m³)
27.777778

Try another scenario

Bank excavation volume (m³)
110.00000000000001
Loose/bank volume ratio
1.25
Compacted/bank volume ratio
0.9
Required compacted fill (m³)
70
Loose excavated volume (m³)
137.5
Potential compacted volume (m³)
99
Surplus compacted-equivalent volume (m³)
29
Loose surplus requiring disposal (m³)
40.277778
Calculation method

Calculation method

Loose excavated volume (m³)

Use explicit measured volume ratios, not ambiguous percent conventions.

Potential compacted volume (m³)

Use explicit measured volume ratios, not ambiguous percent conventions.

Surplus compacted-equivalent volume (m³)

Use explicit measured volume ratios, not ambiguous percent conventions.

Loose surplus requiring disposal (m³)

Use explicit measured volume ratios, not ambiguous percent conventions.

Symbols and units
a
Bank excavation volume (m³)
b
Loose/bank volume ratio
c
Compacted/bank volume ratio
d
Required compacted fill (m³)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Uniform material, ratios user supplied, negative compacted surplus denotes shortfall. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Uniform material, ratios user supplied, negative compacted surplus denotes shortfall.
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