PowerMill is a 3D CAM software that runs on Microsoft Windows operating system which is used for the programming of toolpaths for 5-axis CNC (Computer Numerical Control) milling machines.

PowerMill is developed and sold by Autodesk Inc.[3] The software is used in a range of different engineering industries to determine optimal tool paths to reduce time and manufacturing costs as well as reduce tool loads and produce smooth surface finishes.

The code of PowerMill originates from the software DUCT which was developed in 1973 by Donald Welbourn and Ed Lambourne along with the help of Delta Metal Group, whose funding aided the transfer of the system into industry.

DUCT was initially developed with the sponsorship of Control Data in Germany in the form of access to their time-sharing computing resources.

Delcam's Power Solution range of products that built upon the functionality of the DUCT suite, incorporated the latest user interface technology and offered users many new benefits.