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Compression Index Correlations
Estimate the compression index from liquid limit, void ratio and water content, plus Cr and the Skempton cu/σ′v ratio.
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About this test
Use index properties to estimate compressibility before oedometer results are available, or to compare your lab results with published correlations.
How it's calculated
- Cc = 0.009 (LL − 10)
- Cc = 1.15 (e0 − 0.27)
- Cc = 0.01 wn
- cu/σ′v = 0.11 + 0.0037 PI
Results are calculated from the values you enter using standard formulas. Download the PDF to keep a record. For certified testing, design or construction, talk to our engineers.
Cite this tool
Kataria Engineering & Consultancy Services (2026). Compression Index Correlations [online calculator]. https://katariaengineering.com/tools/compression-index-correlations.html
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