Pregnancy Due Date Calculator
Estimate your due date, see how many weeks pregnant you are, and track trimester milestones using your LMP, conception date, or IVF transfer date.
This is the most common way to estimate a due date for naturally conceived pregnancies.
Estimated due date
November 2, 2026
Current pregnancy week
12w 0d
Trimester
First trimester
Estimated conception date
February 9, 2026
End of first trimester
May 3, 2026
End of second trimester
August 9, 2026
Viability milestone (24 weeks)
July 13, 2026
Full term (37 weeks)
October 12, 2026
Pregnancy progress
30.0% complete
28 weeks until the 40-week mark
Week-by-week timeline
See how far along the pregnancy is and when each week begins.
Week 0
Starts Jan 26
Week 1
Starts Feb 2
Week 2
Starts Feb 9
Week 3
Starts Feb 16
Week 4
Starts Feb 23
Week 5
Starts Mar 2
Week 6
Starts Mar 9
Week 7
Starts Mar 16
Week 8
Starts Mar 23
Week 9
Starts Mar 30
Week 10
Starts Apr 6
Week 11
Starts Apr 13
Week 12
Starts Apr 20
Week 13
Starts Apr 27
Week 14
Starts May 4
Week 15
Starts May 11
Week 16
Starts May 18
Week 17
Starts May 25
Week 18
Starts Jun 1
Week 19
Starts Jun 8
Week 20
Starts Jun 15
Week 21
Starts Jun 22
Week 22
Starts Jun 29
Week 23
Starts Jul 6
Week 24
Starts Jul 13
Week 25
Starts Jul 20
Week 26
Starts Jul 27
Week 27
Starts Aug 3
Week 28
Starts Aug 10
Week 29
Starts Aug 17
Week 30
Starts Aug 24
Week 31
Starts Aug 31
Week 32
Starts Sep 7
Week 33
Starts Sep 14
Week 34
Starts Sep 21
Week 35
Starts Sep 28
Week 36
Starts Oct 5
Week 37
Starts Oct 12
Week 38
Starts Oct 19
Week 39
Starts Oct 26
Week 40
Starts Nov 2
How to Use
- Choose whether you want to calculate from your last menstrual period, conception date, or IVF transfer date.
- Enter the relevant date, and if you choose IVF, select whether the embryo was transferred on day 3 or day 5.
- Review your estimated due date, current pregnancy week, trimester, and conception estimate.
- Use the milestone cards and week-by-week timeline to see important dates during the pregnancy.
Frequently Asked Questions
How is a pregnancy due date calculated from the last menstrual period?
A standard pregnancy due date is typically estimated as 280 days, or 40 weeks, from the first day of your last menstrual period. This assumes ovulation and conception happened about 14 days later.
Is the due date exact?
No. A due date is an estimate, not a guarantee. Most babies are born within a range around the estimated due date, and only a small percentage arrive on that exact day.
Why does conception dating differ from pregnancy weeks?
Pregnancy weeks are usually counted from the last menstrual period, which is about two weeks before conception in a typical cycle. That is why gestational age is usually about two weeks ahead of fetal age.
Are IVF due dates more accurate?
IVF dating is often more precise because the transfer date and embryo age are known. The calculation adjusts for whether a 3-day or 5-day embryo was transferred.
Can an ultrasound change my due date?
Yes. A healthcare provider may update your estimated due date based on early ultrasound measurements, especially if they differ meaningfully from LMP dating.