Here are two online tools that you can use to convert regular text into IPA or American Phonetic Alphabet symbols.
The first one is nice because each sound symbol has an audio component.
I also like the one below because it shows which syllable is stressed. When it comes to spoken English, stress is extremely important!
To read related information on American English pronunciation click on the links below. The 0 means closed for comments.
Tags: IPA, ipa chart, phonemic converter