How many phonemes in the word timing?

The word "timing" has 5 phonemes. Here's how we break it down:

* t - /t/

* ai - /eɪ/ (a diphthong, represented as one phoneme)

* m - /m/

* i - /ɪ/

* ng - /ŋ/ (a single phoneme, representing the "ng" sound)