Ovulation Calendar

This fertility and ovulation calendar helps you determine the most favorable days for conception based on your menstrual cycle. It predicts ovulation dates, fertile windows, and the next menstrual period, allowing you to plan pregnancy and even estimate the baby’s zodiac sign.

First day of menstrual

Cycle length

Menstruation duration

Number of months to calculate

Please, Enter all values correctly.

XX - menstruation
XX - fertile day, probability of conception
XX - ovulation

Save result

Ovulation Prediction Formula

$Ovulation Date = Cycle Start Date + (Cycle Length -14)$

Ovulation typically occurs 14 days before the start of the next period. The fertile window spans 5 days before and 1 day after ovulation. The next period and estimated due date can also be calculated based on this cycle pattern.

This calculator is useful for women tracking their reproductive health, planning to conceive, or understanding their fertility patterns. Simply input the first day of your last menstrual period, average cycle length, and period duration to get a personalized calendar. It displays upcoming ovulation days, fertile periods, next menstruation dates, estimated due date, and potential astrological sign of the baby based on conception. Ideal for family planning and understanding your natural cycle better.