Ensure you have entered the blank hydrometer reading, meniscus correction, and temperature correctly. Also check that your sample weight is in grams, not kg.
Because the original v 9.1 is no longer supported, the geoscience community has created "forks" and improvements:
Never download Gradistat from untrusted "crack" or "serial key" websites. The software is free – anyone charging for it is scamming you. Always scan downloaded .exe or .xls files for malware (though the original is a simple macro workbook).
GRADISTAT is distributed as freeware for educational, research, and non-commercial use. Where to Download
Define the sieve sizes used or import laser data. gradistat v 91 free
: Beyond numbers, it assigns descriptive sediment textures based on the Folk (1954) classification and the Wentworth (1922) size scale.
Grain size analysis is a foundational procedure in geology, physical geography, and environmental science. It helps researchers understand sediment transport, depositional environments, and soil mechanics. While modern laboratory equipment like laser diffraction granulometers can rapidly analyze samples, processing the raw data into meaningful statistical parameters requires specialized software.
Basic knowledge of grain size intervals (microns or phi units). Macros enabled in your Excel security settings.
Note: Ensure your Microsoft Excel allows macro-enabled workbooks ( .xlsm or .xls ) to run the program properly. How to Use GRADISTAT v9.1 Using the software involves a simple workflow: Ensure you have entered the blank hydrometer reading,
A PC or Mac capable of running Microsoft Excel (2010 or newer recommended).
No license. No online activation. The entire program often runs off a USB stick. For fieldwork or working on ancient lab computers, this is a lifesaver.
The following comprehensive guide details what GRADISTAT Version 9.1 offers, how to download and install it safely for free, and how to utilize its core modules for research projects. Key Capabilities of GRADISTAT v9.1
Calculated in metric units (micrometers/millimeters). Geometric Method of Moments: Calculated in metric units. The software is free – anyone charging for
Statistics are provided in both metric units (micrometers) and logarithmic phi units .
is a premier, macro-enabled Microsoft Excel spreadsheet program widely utilized by geologists, geomorphologists, and environmental scientists for calculating sediment grain size statistics. Originally developed by Simon J. Blott and Kenneth Pye, the program automates the complex mathematical equations required to analyze unconsolidated sediments gathered via sieve or laser granulometry methods. Because GRADISTAT is open-source and freely distributed, it serves as an indispensable tool for academic researchers and industry professionals alike. Key Capabilities of GRADISTAT v9.1
Calculates Folk & Ward (1957) graphical measures: mean, sorting, skewness, and kurtosis, plus moment measures (after Friedman, 1962).
To acquire a secure copy without the risk of downloading malicious scripts, you should utilize official distribution nodes: 1. Official Academic & Author Repositories
You can input data in multiple formats: