1. Define your mill geometry — enter section lengths and diameters on the left. Section 3 is the main cylinder; other sections define conical transitions (feed/discharge cones, trunnions).
2. Set the load level— adjust the "Load Level from Axis" slider in Mill Parameters below. Negative values (typical) mean the charge surface is below the mill centreline.
3. Review results — charge volume, percentage fill, and mass breakdown update live as you move any slider. The cross-section and side-view diagrams animate the charge fill in real time.
4. Adjust slurry properties — set % Solids, Ore SG, and Liquid SG to compute bulk slurry density and mass components. Set Throughput to calculate residence time.

Based on the Dave Wiseman method (David Wiseman Pty Ltd, October 1994). Hover or click the info icons on any input or result for a technical explanation.