Estimate due date, gestational age and trimester from LMP or conception date.
This pregnancy due date calculator estimates delivery date using the common 280-day pregnancy length from LMP or 266 days from conception.
The result is only an estimate. Actual due date can vary and should be confirmed by a qualified healthcare professional.
The common estimate adds 280 days, or 40 weeks, to the first day of the last menstrual period. This assumes a typical cycle and gives an estimated due date.
When conception date is known, the calculator adds 266 days. This is because conception usually occurs about two weeks after the LMP in a typical cycle.
Yes. A healthcare provider may adjust the due date, especially after an early dating ultrasound or if cycles are irregular.
No. It is an estimate for planning and tracking pregnancy. Always confirm pregnancy dates and medical decisions with a qualified healthcare professional.