Gradistat V 91 Link | 2025-2027 |

Introduction: The Enduring Legacy of Gradistat In the world of sedimentology and particle size analysis, few pieces of software have achieved the cult status of Gradistat . Developed by Simon J. Blott and Kenneth Pye of the UK-based company CCAP (Committee for the Coordination of Analytical Procedures), Gradistat provided a free, accessible, and scientifically rigorous method for calculating grain size statistics.

But as technology marched on, the original distribution channels disappeared. Today, the most searched phrase regarding this tool is —a desperate plea for the final, stable version of a piece of software that has become increasingly difficult to find. gradistat v 91 link

| Feature | Gradistat v 9.1 (Legacy) | Gradistat Pro (Commercial) | Python (SedPython) | | :--- | :--- | :--- | :--- | | | Free | £250+ | Free (Open Source) | | Ease of Use | High (Excel GUI) | High | Low (Requires coding) | | Method of Moments | Yes | Yes | Yes | | Folk & Ward (1957) | Yes | Yes | Yes | | Data Limit | 16,000 rows | Unlimited | Unlimited | | Output Graphics | Basic histograms | Professional publication-ready | Advanced (Matplotlib/Seaborn) | Introduction: The Enduring Legacy of Gradistat In the

Check the comments below—community members often post active links to the Gradistat v 9.1 archive. Disclaimer: The author of this article is not affiliated with CCAP, Kenneth Pye, or Simon Blott. This guide is for educational preservation of legacy scientific software. But as technology marched on, the original distribution

For nearly two decades, geologists, hydrologists, and soil scientists relied on this simple Microsoft Excel add-in to convert raw sieve and hydrometer data into the Folk and Ward (1957) graphic measures: Mean, Sorting, Skewness, and Kurtosis.