Gradistat V 91 Link _hot_ May 2026

GRADISTAT v9.1: The Professional Choice for Grain Size Analysis

Introduction to Gradistat v 9.1:

  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.

Why It Matters

In an era of expensive proprietary software, Gradistat v9.1 stands out because it operates within Excel. This lowers the barrier to entry—no new interface to learn. You simply input your weight/volume percentages in the input sheet, and the calculation sheet updates instantly. gradistat v 91 link

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 GRADISTAT v9

Sorting Classification: Version 9.1 uses specific sorting thresholds (e.g., <1.27is less than 1.27 is very well sorted, >2.00is greater than 2.00 Visit: The British Geological Survey (BGS) or University

Multiple Input Support: Processes data from standard sieving, laser granulometry, X-ray sedigraphs, or Coulter counters.

  • Version 4.0 (Early 2000s): Basic functionality, limited to 2000 data points.
  • Version 6.0: Introduction of graphical plots and the “Method of Moments” statistics.
  • Version 8.0 (2010): Major overhaul, supporting up to 16,000 data points and adding log-probability plots.
  • Version 9.1 (2015-2018): The definitive edition. This version fixed critical bugs present in v9.0, improved the speed of macro execution, and added compatibility for 64-bit versions of Microsoft Excel (albeit with manual registry tweaks).