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How can I switch a 32-bit installation to a 64-bit one?

I have a 64-bit processor (Intel i3 second gen), and when I installed Ubuntu I went with the 32-bit version because I was just testing it, but now I see it is a lot better than Win7 and want to upgrade to the 64-bit version. Is there any way to do this without reinstalling? Thanks for the help!

marked as duplicate by Mitch, Jjed, stephenmyall, Eliah Kagan, Tom Brossman Sep 13 '12 at 19:34

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There's no way to "upgrade" your current installation of Ubuntu. You would need to reinstall. But you do not need to format the whole drive.

If you have done a /home partition, you can keep it, with all your files.

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