Re: I know bachelors takes 3 years, masters takes 1.5 years HOW long does PHD TAKE???
A PhD normally is 3years minimum, but can take longer. It is a substantial piece of work (100,000 words i think). You normally only do a PhD if you are going into academia or it is necessary for a job (not sure how many jobs are out there though that require a PhD apart from scientists/academia etc).
I wouldn't starting thinking/worrying about PhD's yet...the progress is normally something like this:
Bachelor degree (3 years) ----> honours (1st class- must do really well) (1 year) -----> PhD
or
Bachelor degree (3 years) ----> no honours or honours (2nd class or lower) ---> masters program -----> PhD
Just get through your bachelors degree and then think if you want to do a PhD. A lot can change in 3 years.