How much of a percent would 820 pixels be? I can't get my page centered on anything excpet a 800X600 screen.
That depends on what the browser window width is. 820 is 128% of 640 and 80% of 1024 (roughly).
Maybe a URL would help so we can see how you've coded the page and what you're trying to do might help us troubleshoot for you.
I'm on 1600x1200 and it is not centered but rather flush left.
To make it centered put this right after the <body> tag:
And before the </body> tag put:
p.s. If you want to find out what percent of a window say, 800px wide will take up on a, say, 1280x1024 screen use this equation:
800 / 1280 * 100