Visualize what size aluminum block you need. Enter your part dimensions and see a 3D preview of the raw stock required. Select alloy, adjust stock allowances, and see weight estimates.
Last updated April 2026
Start with your finished part dimensions, then add machining allowance (typically 0.050-0.125" per side for milling), saw kerf (0.08-0.125" per cut), and fixturing allowance if using a vise (0.5-1.0" extra length for clamping). Round up to the nearest standard plate thickness. This tool automates that calculation and shows the resulting block in 3D.
For general CNC milling of aluminum, add 0.060-0.100" per side for roughing and finishing stock. Thicker plates and castings may need more (0.125-0.250") to clean up warpage or surface imperfections. For precision work requiring stress relief between operations, add 0.150" or more per side to allow for material movement after rough machining.