Geotechnical data tools, built for engineers
Geographler provides a suite of free tools for plotting and analysing geotechnical data. Generate clear charts from laboratory and field datasets to classify soils, compare samples, and support engineering decisions.
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Tools
Casagrande Plasticity Chart
Classify soils using Atterberg limits
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Particle Size Distribution
Analyse sieve data and generate PSD curves
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SPT - Friction Angle Correlation
Estimate soil internal friction angle from SPT-N values
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CPT SBTn
Classify soil behaviour using normalised CPT parameters (SBTn)
Open tool →Why Geographler?
We built Geographler because geotechnical engineers deserve fast, reliable chart tools that work in the browser — no installs, no spreadsheet workarounds. Input your data, plot instantly, and export publication-ready charts.
Our toolsResources
New to geotechnical charting? Our Explained articles walk you through the theory behind each tool.
Disclaimer: This tool is provided for informational and educational purposes only and does not constitute professional engineering advice. While reasonable efforts have been made to ensure accuracy, no guarantees are made regarding the correctness or completeness of results. Users are responsible for verifying outputs and ensuring suitability for their specific applications.