Sailcut CAD

Sailcut CAD is a sail design and plotting software which allows you to design and visualise your own sail and compute the accurate development of all panels in flat sheets. The original Sailcut was a Basic program developed by Robert Lainé in 1978. The new version, called Sailcut CAD, is written in C++ using the Qt framework and is developed jointly by Robert Lainé and Jeremy Lainé. It is distributed under the terms of the GNU Public License (GPL).

Sailcut CAD is able to do cross cut, twist foot cut, vertical cut, mitre cut and radial cut sail design as well as wing sails, all in a number of languages. It also includes a viewer where you can assembled a hull, a rig and a set of sails to see how they match. Sailcut CAD has been successfully used for making sails for racing and cruising yacht as well as for model boats.


Sailcut CAD is available for GNU/Linux, MacOS/X and Windows platforms.

Sailcut CAD is also distributed with Debian GNU/Linux.


The Sailcut CAD Handbook is currently available in the following formats:

Mailing lists

There are two mailing lists for the Sailcut CAD community:

Reporting bugs

Your feedback on Sailcut CAD is welcome! If you think you've found a bug, you can check that it has not already been reported on the bug tracker and post a bug report.