Estimate your pregnancy due date from the first day of your last menstrual period (LMP). You can also adjust the calculation for your usual menstrual cycle length.
These dates are calculated from the same LMP-based pregnancy timeline and are approximate.
Pregnancy is conventionally dated from the first day of the last menstrual period, even though conception usually occurs later.
A 28-day menstrual cycle is normally assumed. If your usual cycle is longer or shorter, this calculator adjusts the estimate by the difference.
For example, a 30-day cycle adds:
Vedicaly's Pregnancy Due Date Calculator helps estimate an expected delivery date based on the information entered into the calculator. A due date is an estimate and does not predict the exact day a baby will be born.
Enter the requested date information into the calculator. The tool will use the entered date to estimate your expected due date and pregnancy timeline.
A common method estimates the due date as approximately 40 weeks, or 280 days, from the first day of the last menstrual period (LMP). This calculation assumes a typical menstrual cycle, so the estimate may vary when cycle length or ovulation timing differs.
Pregnancy dating is generally measured from the first day of the last menstrual period. The estimated due date is around 40 weeks from that date, although actual delivery can occur before or after the estimated date.
No. A calculated due date is an estimate. The actual delivery date can differ from the estimated due date.
Healthcare professionals may use ultrasound measurements, particularly from early pregnancy, when assessing pregnancy dating. Your healthcare professional can determine which dating information is most appropriate for your pregnancy.
No. This calculator is intended for general informational purposes and should not replace pregnancy dating, assessment or advice from a qualified healthcare professional.
