Pregnancy Due Date Calculator
Find your estimated due date, see how many weeks along you are, and preview the major milestones of your pregnancy.
This is an estimate only. Only your healthcare provider can confirm your due date.
How this calculator works
This calculator uses Naegele's Rule, the standard method used by healthcare providers worldwide. It adds 280 days (40 weeks) to the first day of your last menstrual period (LMP) to estimate your due date.
The rule assumes a regular 28-day cycle and ovulation on day 14. If your cycle is longer or shorter, or if you know your conception date or have had a first-trimester ultrasound, your actual due date may vary.
Reference: American College of Obstetricians and Gynecologists (ACOG).
This tool is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider or OB-GYN with any questions about your pregnancy.