For most Wordpress users who are self hosting (you have your own domain name etc), it's simply a matter of adding '/feed' on the end of your domain name. For example ''.

There's a good explanation on the Compete Themes website.

If your website is on (they host your website), then this support article tells you how to find your feed.

For those using TypePad, here's a good post that shows you how to find your feed.

If you are still unsure of your RSS feed address, try searching Google with the name of the blogging software you are using.