Gradistat [top] — Download

Gradistat automates this entirely. The user simply inputs weight data into a structured Excel template. The macro then performs a series of complex operations: it calculates the cumulative distribution, interpolates percentiles (e.g., ( D_10, D_50, D_90 )), and outputs up to three different sets of statistical results (e.g., Folk & Ward, Friedman, McManus). What once took an hour now takes seconds. For students in a teaching lab or researchers processing hundreds of samples, downloading Gradistat represents a direct productivity multiplier.

The spreadsheet will load with sample data already entered (usually sieved gravel or sand data). download gradistat

Click the "Calculate Statistics" button within the spreadsheet to generate results. Gradistat automates this entirely

Before you download GradiStat, consider why it has persisted for over two decades in a world of Python and R scripts: What once took an hour now takes seconds

The software doesn't just give you a mean size. It provides a full suite of statistics, including:

This macro-enabled spreadsheet automates the calculation of:

The program was originally published in 2001 in the journal Earth Surface Processes and Landforms .