Gradistat V 91 Free !free! Here
For those wanting to move beyond GRADISTAT, here is a simple guide to getting started with G2Sd:
GRADISTAT v9.1 Free: The Definitive Grain Size Analysis Tool
A: This is almost always due to one of two issues. First, ensure you have enabled macros in your Excel security settings. Second, check that your data is in the correct format (e.g., the first column contains sieve sizes in descending order) and that there are no empty rows or columns interfering with the input range. gradistat v 91 free
Calculated using the traditional geological (phi) scale.
Descriptive terms based on the Folk and Ward scale (e.g., "Very Fine Sand"). For those wanting to move beyond GRADISTAT, here
What did you use? (Sieves, laser, or pipette?) What Excel version are you currently running?
The software is traditionally available for free through university or research organization websites. While the user mentioned "v 9.1," public releases historically include: Kenneth Pye Associates Ltd Version 8.0 Calculated using the traditional geological (phi) scale
This is a more mathematically rigorous method that uses all the data points. It calculates the arithmetic, geometric, or logarithmic mean, variance, skewness, and kurtosis of the entire distribution. While more mathematically robust, it is also more sensitive to outliers.
: Generates cumulative frequency curves and histograms to represent grain size distributions visually. Availability
Scientific literature is filled with citations of GRADISTAT, underscoring its importance. For example, one study on placer deposits in Sri Lanka noted that "the grain size distribution parameters, their graphical analysis and mapping were evaluated using the Gradistat Excel template". This widespread usage confirms its status as a standard analytical tool.

