Selecting the right proppant is critical for optimizing hydraulic fracturing operations. A traditional API proppant crush test provides valuable quality control data but fall short in predicting proppant pack permeability and conductivity. Complete Crush™ provides a new, proprietary approach to proppant crush testing that leverages a modified Kozeny-Carman equation to estimate permeability directly from crush testing, offering engineers a more practical and predictive tool for proppant selection.