Pregnancy Due Date Calculator
Estimate your due date, gestational age, trimester and pregnancy milestones using standard obstetric dating formulas.
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Metrics appear after calculation
Your explanation appears here
Only a small share of births happen exactly on the due date; clinicians may revise dating using early ultrasound or medical context.
Your milestones appear after calculation
Test a different cycle length or date shift without changing your main result.
Calculate your baseline first
For last menstrual period dating, the calculator adds 280 days to the first day of the last period and adjusts for cycle length. Known conception dating adds 266 days. IVF dating uses transfer date plus embryo-age adjustment.
Early ultrasound can estimate gestational age from embryo or fetal measurements. A clinician may update the estimated due date when scan dating is more reliable than period dates or cycle history.
No. The estimated due date is a planning reference, not a prediction. Many births happen in the weeks before or after the due date, and individual medical care should guide decisions.
Results are estimates generated locally in your browser using standard pregnancy dating formulas. They are for informational purposes only, not medical advice, diagnosis, or a substitute for prenatal care. Confirm dating, symptoms, medications, and pregnancy decisions with a qualified healthcare professional. VisionVix accepts no liability for decisions based on this output.