We are all confused. The degrees are only approximately equivalent.
Here is my attempt to give the approximate equivalents, but it will depend on the university, corporation, or government organization where you would like to use your degree credentials:
2 year degree
USA - Associate's Degree (Technical School or Trade School)
UK - Foundation Degree
3 year degree:
UK - Bachelor's Degree
Australia - Bachelor's Degree (2002-)
IT - Laurea triennale
USA - ---
4 year degree
USA - Bachelor's Degree
UK - Honours Bachelor's Degree
UK - Undergraduate Master's Degree
IT - Laurea vecchio Ordinamento
5 year degree
USA - ---
UK - Post graduate Master's Degree
IT - Laurea triennale+2anni, Laurea Magistrale, Laurea Specialistica,
IT - Laurea Ciclo Unico (= Vecchio Ordinamento)
6 year degree
USA - Master's Degree
IT - Laurea triennale+3anni, Laurea Magistrale + 1 anno,
IT - Laurea Specialistica + 1 anno,
IT - Laurea Ciclo Unico (= Vecchio Ordinamento)+ 1 anno
7 years or more
USA - PhD, Doctorate Degree
UK - PhD, Doctorate Degree
IT - Dottorato di Ricerca