6 weeks pregnant is how many months?

Not so material.: If you want to estimate that's 1 1/2 months gestation, but usually pregnancy is measured in weeks and days, e.g. 6 weeks and 5 days. The reason for this is that during formation of the embryo, events are meadured daily and weekly, and when speaking about early labor every single day has a specific outcome and prognosis. This is most important when discussing fetal lung maturity.

1.5 (one & one-half): Assuming average of 4 weeks per month. Normal pregnancy is 40 weeks (280 days) from first day of last menstrual period but given that most months have more than 28 days, normal pregnancy is considered 9 months. But in truth, most are not "normal" w/average duration ranging from 38wks to 42wks. Check out http://www.whattoexpect.com/pregnancy/pregnancy-health/calculating-due-date.aspx for more info.

Pregnancy.: It is considered as first trimester. You're probably one and a half months on course.