I am 15 weeks and 5 days pregnant how much months am i?

Pregnancy: At 15 weeks and 5 days, that is about 3.6 months pregnant. Months, however, are not clinically important to your doctor - they are interested in weeks and days. Your due date will be at 40 weeks and 0 days. Of course, you are unlikely to deliver on your actual due date...

Math: You are 110 days pregnant, and assuming a month is roughly 30 days, you would be 3.6666.... Months pregnant. Best wishes.