The Ponderal Index is similar to the body mass index, but the height is cubed, not squared. The formula is:
ð ə WORD_BOUNDARY p ɑ n d ə ɹ ɹ ə l WORD_BOUNDARY ɪ n d ɛ k s WORD_BOUNDARY ɪ z WORD_BOUNDARY s ɪ m ɪ l ə ɹ WORD_BOUNDARY t ə WORD_BOUNDARY ð ə WORD_BOUNDARY b ɑ d i WORD_BOUNDARY m æ s WORD_BOUNDARY ɪ n d ɛ k s WORD_BOUNDARY b ʌ t WORD_BOUNDARY ð ə WORD_BOUNDARY h aɪ t WORD_BOUNDARY ɪ z WORD_BOUNDARY k j uː b d WORD_BOUNDARY n ɑ t WORD_BOUNDARY s k w ɛ ɹ d WORD_BOUNDARY ð ə WORD_BOUNDARY f ɔ ɹ m j ʊ l ə WORD_BOUNDARY ɪ z WORD_BOUNDARY