Gradistat V 91 Link Exclusive May 2026

The GRADISTAT v 9.1 software is a widely used Microsoft Excel-based program for grain size distribution and statistical analysis of unconsolidated sediments. It is primarily designed to handle data from standard measuring techniques like sieving and laser granulometry. Download and Access

Direct Link: You can find official information and potential download access through the Kenneth Pye Associates Ltd website.

Alternative Versions: Historical versions, such as v 8.0, are sometimes available on academic repositories like Zenodo. Interesting Feature: Versatile Statistical Calculation

A standout feature of GRADISTAT is its ability to calculate statistical parameters using multiple methods simultaneously, allowing for robust comparison of compositionally variable sediments.

Dual Calculation Methods: It calculates mean, mode, sorting, and skewness using both arithmetic/geometric (metric units) and logarithmic (phi units) methods. gradistat v 91 link

Folk and Ward Integration: It applies the classic Folk and Ward graphical methods to modern digital data, which researchers consider a highly robust basis for routine comparisons.

Graphical Outputs: The program automatically generates a range of essential visuals, including frequency plots and ternary plots, directly within the Excel interface.

Method Comparison: It uniquely assigns Folk and Ward descriptive terms to moment statistics, bridging the gap between different analytical frameworks. GRADISTAT v 8.0 - Zenodo

The "Link" Issue: How to Access It

The most common confusion regarding Gradistat is where to find it. Because it is an academic tool often used for commercial consulting as well as student research, access is controlled. The GRADISTAT v 9

  1. Official Source: The software is written by Simon Blott (Kenneth Pye Associates Ltd / formerly University of London). The most reliable way to obtain the "link" or file is via the official Kenneth Pye Associates website or through academic network repositories like ResearchGate.
  2. Compatibility: The "link" usually leads to a download of a .xlsm (Excel Macro-Enabled) file.
    • Note: You must enable macros in Excel for it to work.
    • Password: Some versions are password protected to prevent accidental alteration of formulas. If you are using it for a university course, your department usually provides the file and necessary access.

Where to Find the Authentic Gradistat v 91 Link

A Word of Caution: Because Gradistat v 9.1 is freeware that is no longer officially hosted on the primary CCAP website (which now redirects to a contact page for their commercial software), many third-party sites have hosted the .xla and .xlam files. Downloading Excel macros from untrusted sources can expose you to malware (viruses hidden in VBA code).

However, safe archival of scientific software does exist. The most reliable sources for a gradistat v 91 link as of 2025 include:

  1. The Software Archives (GitHub): Several sedimentology researchers have forked copies of the original Gradistat v 9.1 source code and installation files into GitHub repositories. Look for repositories with active stars and recent audits of the VBA code.
  2. University Sedimentology Labs: Many earth science departments (e.g., University of Plymouth, Texas A&M Geo-resources) host legacy software for student use. Search for site:.edu "gradistat v 9.1" to find institutional links.
  3. ResearchGate Forums: In the "Methods" section of ResearchGate, users constantly share direct links to the zip folder containing Gradistat v 9.1. Ensure the user has high citation credibility.
  4. The Internet Archive (Wayback Machine): Use web.archive.org to find a cached version of the original www.kpal.co.uk/gradistat/ download page.

Direct Search Strategy: If you type gradistat v 91 link into a search engine, avoid sites with excessive pop-up ads or "download managers." The legitimate file is usually named Gradistat_v9_1.zip and is approximately 350–400 KB.

How to Get GradiStat v.91 (The "Link" Workaround)

Since direct HTTP links to .xls files often expire on academic sites, here is the safest method to obtain the software: Official Source: The software is written by Simon

  1. Visit: The British Geological Survey (BGS) or University of Brighton archives.
  2. Search for: "Gradistat Excel Add-in".
  3. File name: Look for gradistat_91.xls (or the common .xla add-in).
  4. Alternative: Check the GitHub sedimentology toolboxes; several users have mirrored v.91 as an open-source reference.

Warning: Ensure macros are enabled. Version 91 requires 32-bit Excel or legacy compatibility mode on modern Office (64-bit may need a patch).

Everything You Need to Know About GradiStat v.91: The Gold Standard for Grain Size Statistics

If you work in sedimentology, soil science, or coastal geomorphology, you have likely heard of GradiStat. For years, this Excel-based add-in has been the quiet workhorse of grain size analysis. Today, we are looking specifically at Version 91—a widely used iteration known for its stability and compatibility.

Note on the Link: The official distribution for GradiStat has historically moved between university servers (often the University of Brighton’s GeoData Institute). As of this writing, the most reliable way to locate the GradiStat v.91 link is to search academic repositories or the Internet Archive (Wayback Machine) for the original gradistat_eng.xls file. Due to the dynamic nature of academic hosting, I have provided the direct file context and setup instructions below rather than a broken URL.