The number of vowel sounds (not letters) equals the number of syllables.
If a word ends in a silent 'e', it does not create a new syllable.
When two vowels are next to each other and make one sound, they count as one syllable.
If a word ends in "le" preceded by a consonant, grab the consonant and the "le" to form the final syllable.
In the IPA Phonetics box, look for the ˈ symbol. The syllable immediately following it carries the primary stress.