GRADISTAT v9.1 is a free, macro-enabled Microsoft Excel spreadsheet designed to analyze grain size statistics. It accepts data from standard sieve analysis, pipette analysis, or laser granulometer output.
The primary source often offers the latest accessible versions.
Assemble your raw data. For sieve analysis, this is typically the weight of sediment (in grams) retained on each sieve screen. For laser diffraction, this is the percentage volume of each particle size class. 2. Inputting Data Open the GRADISTAT Excel file. Input the sieve screen mesh sizes (in mm or phi).
Hey everyone,
Links for the 2001 publication and associated software can be found via search.
Because it’s a 32-bit legacy application, v9.1 Free struggles with modern big data:
GRADISTAT's enduring popularity comes from its ability to calculate a comprehensive suite of grain size parameters. These include:
If you are looking for specific guidance on setting up your data, I can: Explain how to format sieve data for the input sheet.