Due Date Calculator

Calculating Your Due Date:
Your due date is estimated by adding 40 weeks (280 days) to the approximate date of conception. The date of conception is considered to be about 2 weeks after the first day of your last menstrual cycle. Only 5% of women deliver their babies on their projected due date, so this date should be used as an estimate it is not an exact calculation.

Last Menstrual Period: (MM/DD/YYYY format)

Average Length of Cycles: (22 to 45) (defaults to 28)

Average Luteal Phase Length: (9 to 16) (defaults to 14)

Estimated Conception:

Estimated Due Date:

Estimated Fetal Age: