Ma'auni na Farashin Mabukaci (CPI) shine ma'auni na matsakaicin canjin farashin da masu amfani da birni ke biya don ƙayyadadden kwandon kaya da sabis na tsawon lokaci. Ofishin Kididdiga na Ma'aikata (BLS) ne ke ƙididdige CPI kuma ana amfani da shi azaman ma'aunin hauhawar farashi da kuma kayan aiki don yin gyare-gyare a manufofin tattalin arziki. CPI tana auna sauye-sauyen farashi a cikin kayayyaki da ayyuka da yawa, gami da abinci, gidaje, sufuri, tufafi, kula da lafiya, da nishaɗi. Yana daya daga cikin matakan da aka fi amfani da shi na hauhawar farashin kayayyaki a Amurka da sauran kasashe.