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Ovulation calculator

Ovulation calculator allows you to calculate estimated due date of you baby, conception date and current pregnancy term.

Enter information about your menstrual period to calculate your due date and conception date

Date of the first day of last menstruation (
Average length of menstrual cycle:
(from 22 to 45, usually 28)
Average duration of luteal phase:
(from 9 to 16, often 14)
Your estimated due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28 day cycle). Remember that your due date is an estimate. Every pregnancy is unique and your baby will come when it's ready. The conception day is the day when your baby was conceived. Conception date is calculated from the pregnancy due date.