Change excerpt length in WP by eckert
The default excerpt length in WordPress is 55 words.
If you want to change it, go into “wp-includes”, “formatting.php” and scroll down to line 1812 (in versions prior to 2.7, it was line 853). If you are unable to find it, just do a find on the page for “55″ and you should come across it.
Change the “55″ to however many words you’d like it to be.