Here is a small formula of calculation intended for those who have difficulty in choosing the surface of their sail. Choose your type of practice, indicate your weight and its done... Naturally, this formula is not infallible, and will be quite permanently in beta test.

Laid originally by Verhaeghe, relieved by Mobidique, and modified in a very effective way by Lomic, it is in the course of adjustment thanks to the numerous returns of the windsurfing community the web.

Well, it is clear that that does not replace the tests on the water, the experience, the feeling once on the spot... But it can have its utility!

The proposed results are targeted for a "normal" use of the sail, so, if you base yourselves on the calculation, you should be neither overpowered nor underpowered.