Calculate your estimated due date based on your last menstrual period (LMP). Our due date calculator uses Naegele's rule to provide accurate pregnancy timeline estimates for expecting mothers.
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How this calculator works
Adds 280 days (40 weeks) to the first day of the last menstrual period to estimate the due date.
Common questions about this calculator
Pregnancy calculators provide estimates based on standard formulas. Every pregnancy is unique. Always consult your OB-GYN or midwife for personalized care.
