Calculate your estimated due date using your last menstrual period (LMP), conception date, or IVF transfer date. Track your pregnancy progress and upcoming milestones.
When did your last menstrual period start?
Estimated Due Date
September 14, 2026
224 days to go
8 weeks, 0 days
Trimester 1
20% complete
1st Trimester
Weeks 1-12
2nd Trimester
Weeks 13-26
3rd Trimester
Weeks 27-40
Week 8: Raspberry
Conception Date
December 22, 2025
First Day of Last Period
December 8, 2025
Heartbeat detectable
Week 6 • Jan 19
End of first trimester
Week 12 • Mar 2
Anatomy scan (18-20 weeks)
Week 18 • Apr 13
Viability milestone
Week 24 • May 25
Third trimester begins
Week 27 • Jun 15
Full term
Week 37 • Aug 24
Due date
Week 40 • Sep 14
This calculator estimates your due date based on a standard 40-week (280-day) pregnancy. The calculation uses Naegele's rule, which assumes a 28-day menstrual cycle and ovulation on day 14.
This is an estimate only. Only about 5% of babies are born on their exact due date. Most are born within 2 weeks before or after. Always consult with your healthcare provider for accurate dating.