Pregnancy Due Date Calculator

Estimate a pregnancy due date from the first day of your last menstrual period.

First day of last menstrual period

Estimated due date

June 14, 2027

So funktioniert's

Applies Naegele's rule: due date ≈ first day of last period + 280 days (40 weeks).

It's an estimate — only about 5% of babies are born exactly on their due date. Always confirm with your doctor.