Pregnancy Due Date Calculator
Calculate your estimated delivery date (EDD), gestational age in weeks and days, current trimester, and key fetal milestone timelines using clinical Naegele's rule.
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Clinical Evaluation
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Accurate gestational dating forms the clinical cornerstone of modern obstetric care. Knowing your estimated due date allows timely scheduling of first-trimester viability scans, nuchal translucency (NT) screenings, anomaly scans, and glucose tolerance tests.
Formula & Clinical Methodology
Calculated using Naegele's Rule: Estimated Due Date = First day of Last Menstrual Period (LMP) + 280 days (40 weeks), adjusted for your personal menstrual cycle length (default 28 days). If calculating by conception or IVF embryo transfer date, 266 days (38 weeks) are added.
Dr. Madhupriya
Obstetrician, Gynaecologist & Fertility Specialist
MBBS, DNB (OG), MRCOG, Diploma in Advanced Gynaecological Laparoscopy (Germany), FRM (Fellowship in Reproductive Medicine)
Expert prenatal care, ultrasound monitoring, and gentle birth planning at Shree Specialty Clinics, Chennai.
Clinical Purpose & Medical Disclaimer
This calculator provides estimated values based on standard clinical algorithms. It is not intended to replace an in-person diagnostic evaluation, laboratory analysis, or direct specialist consultation. Shree Specialty Clinics does not make diagnoses solely based on online self-assessment tools.