Quote Originally Posted by BobInce View Post
dpi settings are irrelevant on the web and will be ignored by web browsers, which will display your images at 1:1 pixels.....
What this means in terms of images is that if the image is 640 x 480 pixels, it will show as 6.666" x 5" on a windows machine and 8.888" x 6.666" on a Mac. If you want it to display smaller then you will have to physically reduce the size of the image. You cannot change the resolution .... (Ignoring the silly 120 dpi option of course) ....

As Bob said, the actual dpi of the image is irrelevant only it's physical size in pixels matters.