See which week of pregnancy you are in today, your trimester, how many days are left and what usually happens in the weeks ahead.
This is an estimate for general information, not medical advice. Timings of scans and tests vary between countries and clinics. Please consult your doctor or midwife about your own care.
Doctors, scan reports and antenatal cards describe a pregnancy in weeks and days, written like 15+6 or 15w6d, because a lot changes from one week to the next and months are too uneven to be useful. The count starts on the first day of the last menstrual period and runs to 40 weeks, the estimated due date. This tool turns either your last period date or your due date into today's exact week and day, the trimester, the days left, how much of the 40 weeks has passed, and a list of the general milestones most pregnancies go through.
This is the most common source of confusion. At 15 weeks and 6 days you have completed 15 weeks and are partway through your 16th week, so apps and people may say either "15 weeks pregnant" or "in week 16". The calculator shows both: the large figure is the week you are in, and Exactly shows the completed weeks and days that doctors write down.
From a last period date, the due date is that date plus 280 days, moved later or earlier by your cycle length minus 28. From a due date, it is used as given. Gestational age today is then 280 days minus the days left until the due date. The first trimester runs to 13 weeks 6 days, the second from 14 weeks to 27 weeks 6 days, and the third from 28 weeks to birth. The percentage is simply the days so far divided by 280.
Your doctor has told you the due date is 20 April 2027. On 2 November 2026 there are 169 days to go, so the gestational age is 280 - 169 = 111 days, which is 15 weeks and 6 days. You are in week 16 of the second trimester and 39.6% of the way through the 40 weeks. The next day you reach 16 weeks exactly.
The list holds broad, commonly used time windows, such as the first trimester scan around 11 to 14 weeks, the anomaly scan around 18 to 22 weeks and screening for gestational diabetes around 24 to 28 weeks. Your clinic may schedule things differently, and every pregnancy is different; feeling movement earlier or later than a friend did is usually nothing unusual. The term labels follow the American College of Obstetricians and Gynecologists definitions.
The numbers here are an estimate for general information and are not medical advice. They cannot tell you whether a pregnancy is healthy. Please consult your doctor or midwife for your care, and contact them promptly about bleeding, pain, reduced movements or anything that worries you.
