Estimate your due date using Naegele's rule — the standard obstetric formula based on the first day of your last menstrual period.
Based on a typical 28-day cycle. If your cycles are longer or shorter, an ultrasound-based due date from your doctor will be more accurate.
Enter a date to see your estimated due date.
For general information only.
This calculator provides a general estimate based on standard, published formulas. It does not account for your individual medical history and is not a substitute for professional medical advice, diagnosis, or treatment. Always talk to a qualified doctor about your results — especially before making any health decisions.
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