Pregnancy Due Date Calculator
Estimate a pregnancy due date from the first day of your last menstrual period.
Estimated due date
June 14, 2027
How it works
Applies Naegele's rule: due date ≈ first day of last period + 280 days (40 weeks).
Is this exact?
It's an estimate — only about 5% of babies are born exactly on their due date. Always confirm with your doctor.