Just make an uploadable image of wings shape, and calculate all!
You can make a photo, and convert it to B/W image, or you can draw anything you wish by any image editor, then enter actual image height in mm, and upload it here.
Wing's surface color must be "black", gap color - "white".
Supported image format: "gif", "png" and "jpg".
Maximum file size: 4.0 MB.
Maximum image size: 2600x1950 px.