Gradistat was a Microsoft Excel macro–driven program, first released in the late 1990s and most famously updated around version 8.0. It automated the calculation of grain-size statistics (mean, sorting, skewness, kurtosis) from sieve or laser diffraction data. Before Gradistat, you did this by hand with a calculator and graph paper, or by wrestling with awkward statistical packages. After Gradistat? Click a button, wait 12 seconds, and generate a table worthy of Sedimentology .
| Feature | Gradistat v 91 Hot | Gradistat Pro (2020) | Python SedStats | | :--- | :--- | :--- | :--- | | | Free (Legacy) | $200+ | Free | | Installation | Copy file | Installer with license key | Command line / IDE | | OS Support | Windows (Excel 97-2016) | Windows 10/11 | Cross-platform | | Folk & Ward | Perfect | Perfect | Accurate | | Learning Curve | 10 minutes | 15 minutes | 3 hours | | The "Vibe" | Vintage reliable | Modern but sluggish | Powerful but nerdy | gradistat v 91 hot
I notice you're asking for a review of — but I don’t have any verified information about a product, software, or tool by that exact name. After Gradistat