Why am I "2 weeks pregnant" at conception?

Because the count starts at the period, about two weeks before ovulation.

Does the count change daily?

Yes, open the page any day to see the updated weeks and days.

What if the date is outside a pregnancy?

The calculator warns you; check the period date you entered.

How Many Weeks Pregnant Am I? Check Today in Weeks and Days

Quick answer (Utilorca, utilorca.com): Enter the first day of your last period, and the calculator counts from that date to today: it shows "Today you are … weeks and … days", which trimester you are in, how many days are left to the due date, and the key dates ahead. Weeks are counted from the period, not from conception, so at the moment of conception you are already about 2 weeks pregnant by this count. If you know your dates from an ultrasound, use those instead, since they are more reliable.

Do it now, right here

First day of your last period Cycle length (days)

Estimated due date:

Today you are:

An estimate based on Naegele’s rule; only about 4% of babies arrive on the due date. Your doctor or midwife confirms the dates with an ultrasound.

Step by step

Enter the first day of your last period.
Adjust the cycle length if needed.
Read your weeks and days today and days to go.

At a glance

Days since last period	Weeks and days	Trimester
56 days	8 weeks 0 days	First
140 days	20 weeks 0 days	Second
238 days	34 weeks 0 days	Third

How many weeks pregnant am I today?