Due Date Calculator

Find your estimated due date and current week of pregnancy.

Due date calculator

Estimated due date

Sun, May 23, 2027

Today: 10 weeks 0 days · trimester 1 · 210 days to go

End of 1st trimester (13w 6d): Sat, November 21, 2026
Anatomy scan (18–22 weeks): Sun, January 3, 2027
3rd trimester begins (28 weeks): Sun, February 28, 2027
Full term (39 weeks): Sun, May 16, 2027
Due date (40 weeks): Sun, May 23, 2027
Post-term (42 weeks): Sun, June 6, 2027

Only about 1 in 20 babies arrive on the due date. If an early ultrasound gives a different date, your provider's date takes priority.

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Due date = first day of last period + 280 days (Naegele's rule), adjusted for cycle length. Korean clinics count pregnancy in weeks and days from the last period.

FAQ

How is the due date calculated?

First day of your last period plus 280 days.

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Ovulation Date / D-day Korean age